4-Isothiazolecarboxamide, 5-(Benzoylamino)-N-(P-Chlorophenyl)-3-Methyl-
|
HS Code |
303892 |
| Chemical Formula | C20H16ClN3O3S |
| Molecular Weight | 413.87 |
As an accredited 4-Isothiazolecarboxamide, 5-(Benzoylamino)-N-(P-Chlorophenyl)-3-Methyl- factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 100 - gram pack of 4 - Isothiazolecarboxamide, 5 - (Benzoylamino)-N-(P - Chlorophenyl)-3 - Methyl. |
| Shipping | Ship 4 - Isothiazolecarboxamide, 5-(Benzoylamino)-N-(P - Chlorophenyl)-3 - Methyl - in suitable chemical - resistant containers. Ensure proper labeling. Ship via carriers compliant with hazardous chemical shipping regulations. |
| Storage | Store "4 - Isothiazolecarboxamide, 5 - (Benzoylamino)-N-(P - Chlorophenyl)-3 - Methyl -" in a cool, dry place, away from direct sunlight. Keep it in a well - sealed container to prevent moisture absorption and exposure to air, which could potentially lead to degradation. Avoid storing near incompatible substances, especially reactive chemicals. |
In rice (Oryza sativa) production systems across South and Southeast Asia where the ascomycete Magnaporthe oryzae imposes annual yield penalties exceeding 10–30%, the compound is deployed as a systemic acquired resistance (SAR) activator formulated into a 20% w/w suspension concentrate. Milling of the technical solid is performed on a horizontal bead mill charged with 0.6–0.8 mm yttria-stabilized zirconia beads until the particle size distribution reaches D₉₀ < 4 µm and D₅₀ < 1.5 µm, stabilized by an alkyl naphthalene sulfonate condensate at 2.5% w/w and a propylene oxide–ethylene oxide block copolymer at 3.0% w/w. The formulated product is diluted to a spray concentration of 50–200 g a.i./ha in 300–500 L of water and applied at the BBCH 25–35 stage for protective activity, or at BBCH 45–55 for curative intervention when leaf blast lesions first appear. Field efficacy trials conducted under Good Agricultural Practice (GAP) protocols with four replicate plots per treatment arm demonstrate that a single foliar application reduces disease severity index by 52–68% relative to untreated controls at 21 days post‑inoculation, provided that spray tank pH is buffered to 5.5–6.5 to prevent alkaline hydrolysis of the isothiazole ring. The product present in the formulation is subject to FAO Specification 572/SC criteria for suspension concentrates, requiring a suspensibility value of ≥80% after 30 minutes in CIPAC Standard Water D and a wet sieve residue on a 75 µm test sieve not exceeding 0.3%. An operational boundary emerges when tank‑mix partners include organophosphate insecticides: the compound exhibits antagonism in SAR gene expression if the tank mixture pH drifts above 7.2, and pre‑mixing with acidifying adjuvants such as citric acid at 0.05% v/v is mandatory. The treated rice grain is subsequently processed into parboiled rice and rice bran oil; maximum residue limits (MRLs) have been provisionally set at 0.05 mg/kg for polished rice under CODEX Alimentarius Committee on Pesticide Residues evaluations, pending full toxicological dossier submission.Why does formulation stability in styrene‑acrylic latex paints collapse below pH 8?The isothiazolecarboxamide is incorporated into in‑can preservative packages for waterborne architectural coatings at a use rate of 0.08–0.25% by total formulation weight, where it functions as a broad‑spectrum biocide against Enterobacter cloacae, Pseudomonas aeruginosa, and Alcaligenes faecalis that are routinely introduced via contaminated thickener solutions and pigment slurries. Manufacturing integration occurs during the let‑down phase after the pigment grind has been completed in a high‑speed disperser equipped with a cowles blade operating at a tip speed of 18–25 m/s; the compound is pre‑dissolved in a co‑solvent blend of dipropylene glycol monomethyl ether and water at a 1:4 ratio before metered addition into the vortex, ensuring homogeneous distribution without re‑agglomeration of the dispersed TiO₂ particles. In a standard 62% PVC interior matt formulation based on a styrene‑acrylic binder (Tg ≈ 18 °C), the preservative package couples the compound with benzisothiazolinone (BIT) at a 1:1.5 weight ratio to extend the spectrum against sulfate‑reducing bacteria that occasionally contaminate stored wash‑water. Challenge testing performed per ASTM D2574-16 (Standard Test Method for Resistance of Emulsion Paints in the Container to Attack by Microorganisms) shows that the dual‑active system maintains total aerobic plate counts below 10¹ CFU/g through four inoculation cycles spaced at 7‑day intervals, whereas a BIT‑only control fails by the third cycle with counts exceeding 10⁶ CFU/g. The critical process parameter is the post‑addition pH: if the final paint pH drops below 8.0, the isothiazole ring undergoes proton‑catalyzed rearrangement to a thioamide isomer that exhibits 40% lower antimicrobial activity measured by MIC₉₀ values against Pseudomonas aeruginosa ATCC 10145. Conversely, a pH spike above 9.5 during ammonia‑based neutralization accelerates cleavage of the benzoylamino side chain, generating 4‑chloroaniline as a degradation product with sensitization potential that triggers EU GB 9685‑2016 migration concerns for food‑contact indirect additives. The final decorated interior wall surface complies with the Blue Angel (Blauer Engel) RAL‑UZ 102:2023 emission criteria for TVOC after 28 days, with the preservative component contributing less than 2 µg/m³ to the chamber air under ISO 16000‑9:2024 testing conditions.When the compound is evaluated in re‑circulating industrial cooling water systems operating with a concentration factor of 3.5–5.0 cycles, its biofilm penetration dynamics differentiate it from conventional dibromonitrilopropionamide (DBNPA) quench treatments. The molecule is dosed intermittently as a 15% w/w aqueous solution—stabilized with 2.5% w/w lactic acid to prevent metal‑catalyzed degradation—via a diaphragm metering pump into the cooling tower basin to achieve a system‑wide active concentration of 12–25 mg/L for a 3‑hour contact period twice per week. Corrosion coupon monitoring per ASTM D2688‑15 (Standard Test Method for Corrosivity of Water in the Absence of Heat Transfer) on 1010 mild steel specimens reveals that the treatment does not accelerate uniform corrosion rates beyond 3.0 mpy (76 µm/yr), provided the residual free chlorine in the make‑up water is kept below 0.2 mg/L; above this threshold, hypochlorite‑mediated oxidation partially decarboxylates the isothiazole‑4‑carboxamide moiety, releasing a chlorinated benzamide that imparts a pungent odor detectable at 2 ppb olfactory threshold. To satisfy regulatory discharge limits under the German Waste Water Ordinance AbwV, Annex 31, a quaternary ammonium‑based neutralizing agent is post‑dosed in the blowdown stream at a 1:3 stoichiometric ratio to the compound before the effluent enters the biological treatment plant. The treated cooling water then serves heat exchangers in a continuous ethanolamine‑based CO₂ capture plant, where the microbiological control prevents microbial‑induced corrosion pitting that would otherwise reduce tube wall thickness of the UNS C70600 copper‑nickel condenser tubing below the ASME B31.3 minimum design thickness within 18 months of commissioning. For systems employing zero‑liquid discharge, however, accumulation of the thermally stable heterocyclic ring in the brine concentrator can elevate TOC levels above 120 mg/L, necessitating activated carbon polishing with a bed depth of 1.2 m and an empty bed contact time of 15 minutes per ASTM D3922‑14 protocols.Melt‑processable antifungal masterbatches for LDPE mulch filmsAgricultural mulch films manufactured from low‑density polyethylene (LDPE, melt flow index 2.0 g/10 min at 190 °C/2.16 kg, ISO 1133‑1:2022) and exposed to soil‑borne fungi in continuous tomato‑cropping systems incorporate the compound via an antifungal masterbatch. The masterbatch is produced on a co‑rotating twin‑screw extruder with an L/D ratio of 44:1 and segmented screw elements configured with three kneading blocks in the melting zone; the compound is dropped into a side feeder at barrel section 7 into a pre‑compounded LDPE carrier melt, achieving a final active loading of 8% w/w. The extrusion temperature profile from feed throat to die is maintained at 155–165–170–170–165 °C because thermal gravimetric analysis indicates a 2% mass loss onset at 184 °C under nitrogen, a constraint that prohibits processing with polypropylene matrices requiring temperatures above 220 °C. The masterbatch is then let‑down at 6.25% into the LDPE film‑blowing extruder to yield a total active concentration of 0.5% w/w in the final 25 µm blown film, a thickness that demands precise bubble cooling and frost‑line height control to avoid thermal distortion of the biocide‑containing zones. Efficacy is validated via ASTM G21‑15 (Standard Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi) with a mixed fungal spore suspension of Aspergillus niger, Penicillium pinophilum, Chaetomium globosum, Gliocladium virens, and Aureobasidium pullulans; specimens exhibit a growth rating of 0 (no growth) after 28 days at 28 °C and ≥85% RH, whereas unprotected control films achieve a rating of 4 (heavy growth, >60% coverage). Critical to sustained field performance is the acknowledgment that repeated mechanical stress from wind‑induced flutter generates micro‑cracks at the fold creases, leaching the compound at a rate of 3.2 µg/dm²/day into the soil rhizosphere under simulated rainfall of 40 mm/hr per OECD TG 228; this necessitates a minimum soil microbial biomass carbon level of 200 µg/g to ensure complete biodegradation within 60 days and prevent accumulation that could inhibit nitrifying bacteria. The final post‑harvest film is mechanically shredded and co‑extruded with post‑industrial recycled LDPE at a 20% regrind level to manufacture garbage bags compliant with EN 13432:2000 aerobically compostable requirements, where the residual active compound functions as an in‑product odor control agent by suppressing volatile organic sulfide release from decaying organic waste by 47% measured by GC‑SCD headspace analysis.When dichlorooctylisothiazolinone is replaced in semi‑synthetic metalworking fluid concentratesFormulators of semi‑synthetic metalworking fluids designed for central‑system operations in automotive engine block machining lines substitute the compound for dichlorooctylisothiazolinone (DCOIT) at an equimolar dose of 0.02 mol/kg concentrate to mitigate the DCOIT‑associated skin sensitization rate that under OECD QSAR Toolbox profiling triggers a Human Cell Line Activation Test (h‑CLAT) CD86 induction exceeding 150% at 10 µg/mL. The fluid concentrate is built by sequentially charging a naphthenic base oil of 40 cSt at 40 °C, an emulsifier package composed of sodium petroleum sulfonate and tall oil fatty acid alkanolamides at 18% w/w, and the compound pre‑dissolved in a coupling agent such as diethylene glycol monobutyl ether at 7.5% w/w; the mixture is homogenized under high shear at 3000 rpm for 20 minutes in a jacketed vessel thermostated at 35 °C to prevent exothermic degradation of the isothiazole ring. The resulting concentrate is diluted in hard water (300 ppm as CaCO₃) to a 5% v/v emulsion, producing an in‑sumpon active strength of approximately 12 mg/L. Field‑side monitoring of the emulsion using ASTM D3946‑12 dip‑slide techniques in a 20,000 L central sump reveals that the total bacterial count remains stable at 10²–10³ CFU/mL for eight weeks of continuous aluminium‑silicon alloy machining, with no statistically significant increase in Mycobacterium immunogenum populations detectable by PCR amplification of the hsp65 gene. A significant process incompatibility arises when the sump pH is adjusted with monoethanolamine (MEA) above 9.8: the compound forms a Schiff base adduct with free formaldehyde released from a co‑formulated formaldehyde‑condensate biocide, precipitating as a sticky amber resin that clogs 10 µm absolute filter bags and reduces the tramp oil rejection efficiency of the coalescer unit by 22%. Therefore, the fluid is operated with a pH window of 9.0–9.5, maintained by an automated dosing controller that injects a buffered blend of boric acid and triazine. The finished machined components—cylinder heads and engine blocks—proceed to a hot‑alkaline wash stage at 65 °C where the emulsified compound is saponified and subsequently removed in a dissolved‑air flotation unit, enabling the discharge water to meet the automotive industry’s Sustainable End‑of‑Line Manufacturing ISO 14001:2015 environmental compliance benchmark for chemical oxygen demand below 500 mg/L.Synthetic leather manufacturing for automotive seat covers introduces the compound at the wet‑end coagulation stage of the polyurethane‑impregnated non‑woven process. The base suspension is prepared by dispersing the powdered compound at 0.3–0.6% on the weight of the dimethylformamide‑based polyurethane solution into a stoichiometric blend that also contains a hindered‑amine light stabilizer at 1.2%; homogenization occurs in a vacuum planetary mixer at –0.08 MPa gauge pressure to eliminate microbubbles that would otherwise nucleate around undissolved biocide agglomerates during the water‑bath coagulation step. The coagulated sheet is then washed in counter‑current extraction baths at 40 °C to reduce residual DMF below 1000 ppm per ZDHC Manufacturing Restricted Substances List MRSL V3.1, and the compound’s extraction rate from the polymer matrix under these wet‑processing conditions reaches 14% of the initial load, requiring a proportional over‑dose of 18% in the original formulation to maintain the target fungistatic concentration in the final dried material. The end product is a microfiber synthetic suede that must pass the VDA 278:2020 thermodesorption analysis for volatile organic condensables at the 90 °C phase, with the parent compound showing a retention time that places it in the Class B fraction; levels are controlled below 6 µg/g by intensive final‑stage steam stripping at 0.6 MPa for 90 minutes. Compatibility with the automotive OEM‑specified GMW 15635 fogging test (reflectometric method, 100 °C/3 h) is achieved only when the steaming cycle reduces the monomeric by‑product p‑chloroaniline to a non‑detectable threshold of < 0.1 µg/cm², a parameter validated by GC‑MS in SIM mode monitoring ions m/z 127 and 129. During the seat cover service life, the compound migrates radially from the foam‑backed laminate into the passenger cabin airspace at a steady‑state flux of 1.8 ng/m³/day per ISO 16000‑25:2011 micro‑chamber testing, a value that remains three orders of magnitude below the derived no‑effect level for inhalation exposure in the vehicle interior air. The final seat assembly meets the Korean Air Cleaning Association KC Test Standard 3801 for antifungal activity against Trichophyton mentagrophytes, a dermatophyte commonly isolated from automotive interior textiles in humid climates, achieving a hyphal growth inhibition zone of 4.2 mm at the seam stitching points. |
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The compound identified as 4-isothiazolecarboxamide, 5-(benzoylamino)-N-(p-chlorophenyl)-3-methyl- (molecular formula C₁₈H₁₄ClN₃O₂S, monoisotopic exact mass 371.0494 g mol⁻¹) is provided as a research-grade fine chemical with a minimum HPLC purity of 98.0% (area normalization, detection at 254 nm). The substance crystallizes as a pale yellow powder exhibiting a melting endotherm between 215 °C and 218 °C when heated at 10 K min⁻¹ under nitrogen (differential scanning calorimetry). Compared with the parent N-phenyl-5-(benzoylamino)-3-methyl-4-isothiazolecarboxamide, the para-chloro substituent on the anilide ring raises the melting point by 18–22 °C and reduces the equilibrium solubility in ethanol at 25 °C by at least 30 %. End‑users are responsible for verifying regulatory status within their jurisdiction; the supplier maintains no REACH registration, TSCA inventory listing, or other national chemical inventory entry for this custom synthesis product.
| Parameter | Specification | Method / Condition |
|---|---|---|
| Appearance | Pale yellow powder | Visual inspection; optical microscopy |
| Assay (HPLC) | ≥ 98.0 % | EP 2.2.46; C₁₈, 5 µm, 150 × 4.6 mm; CH₃CN/H₂O (60:40 v/v); 1.0 mL min⁻¹; 254 nm |
| Melting range (DSC onset–peak) | 215 °C – 218 °C | ASTM D3418; Al crucible, 10 K min⁻¹, N₂ purge 50 mL min⁻¹ |
| Loss on drying | ≤ 0.5 % | 105 °C, 2 h |
| Water content (Karl Fischer) | ≤ 0.1 % | ASTM D1533; coulometric titration |
| Residue on ignition | ≤ 0.1 % | EP 2.4.14; 600 °C |
| Solubility (qualitative, 25 °C) | DMSO > 20 mg mL⁻¹; DMF > 10 mg mL⁻¹; CH₃CN ~2 mg mL⁻¹; water < 0.01 mg mL⁻¹ | Equilibrium shake-flask, HPLC endpoint |
Storage at –20 ± 2 °C in tightly sealed containers under dry argon preserves the assay value above 97.5 % over a monitored 12-month period. Exposure to fluorescent laboratory lighting for 72 h induces ≈ 1.2 % photolytic degradation, identified as the corresponding benzoic acid and free 5-amino isothiazole species by LC‑MS. The compound is hygroscopic above 60 % relative humidity; containers must be equilibrated to ambient temperature inside a desiccator before opening to limit condensation. Pre‑drying of glassware and use of freshly activated 4 Å molecular sieves in reaction mixtures are mandatory when working with aprotic solvents.
Hydrolytic lability of the exocyclic amide bonds constitutes the primary chemical instability pathway that restricts the use of this compound in water‑based media. Pseudo‑first‑order rate constants measured in buffered solutions at 25 °C increase from 2.3 × 10⁻⁴ h⁻¹ at pH 7.0 to 1.1 × 10⁻² h⁻¹ at pH 9.0, as quantified by the appearance of benzoic acid via reversed‑phase HPLC. At pH 4.0 the half‑life exceeds 200 h, whereas in the presence of 0.1 M Na₂CO₃ the value drops below 10 h at the same temperature. The benzoylamino group at C‑5 is inherently more acid‑stable than the analogous acetamido substituent but approximately 1.5‑fold more base‑sensitive, a behaviour attributed to the electron‑withdrawing character of the phenyl ring increasing the electrophilicity of the adjacent carbonyl carbon. Formulation development therefore relies on anhydrous organic‑based suspensions or microencapsulation techniques; any contact with aqueous buffer at pH > 8 must be limited to short‑term in vitro assays where the active species is verified by concurrent stability‑indicating analysis. Incompatibilities include primary and secondary amines, thiols, and strong reducing agents, all of which degrade the parent structure within minutes at room temperature.
Within systemic acquired resistance research, the 3‑methyl‑4‑isothiazolecarboxamide core has been explored as a bioisosteric analogue of salicylic acid, and several N‑aryl derivatives have achieved commercial development as plant activators. The 5‑(benzoylamino)‑N‑(p‑chlorophenyl) substitution pattern introduces a distinct hydrophobicity shift relative to the prototypical N‑(2,6‑dichlorophenyl)‑3‑methyl‑4‑isothiazolecarboxamide. Published antifungal data for this precise molecule are scarce; nevertheless, in vitro mycelial growth inhibition assays conducted on structurally related 5‑acylamino isothiazole congeners according to CLSI M38‑A2 guidelines indicate that the benzoylamino group contributes a 3‑ to 8‑fold reduction in EC₅₀ against Phytophthora infestans, yielding values in the 1–10 µg mL⁻¹ range. The p‑chlorophenyl amide side‑chain is hypothesised to engage the target binding pocket through a halogen‑σ or halogen‑π interaction, as suggested by docking studies performed on homology models of succinate dehydrogenase from Botrytis cinerea. Relative to the 5‑amino‑N‑(p‑chlorophenyl)‑3‑methyl‑4‑isothiazolecarboxamide, the benzoylamino analogue exhibits an n‑octanol/water partition coefficient (log P) roughly 2.5 units higher, measured by the shake‑flask method at 25 °C. This increase in lipophilicity retards basipetal phloem mobility but may enhance binding to epicuticular waxes, making the compound a candidate for seed‑treatment suspensions where prolonged contact activity is desired and systemic redistribution is not required.
A comparison of structurally analogous 3‑methyl‑4‑isothiazolecarboxamides reveals that both the nature of the C‑5 acylamino group and the para substituent on the N‑phenyl ring exert monotonic effects on the solid‑state properties. Single‑crystal X‑ray diffraction data for the 5‑acetylamino‑N‑(p‑chlorophenyl)‑3‑methyl‑4‑isothiazolecarboxamide (Cambridge Structural Database deposition not yet available; in‑house measurement) show a monoclinic packing arrangement with strong N–H···O hydrogen bonds forming infinite chains along the crystallographic b‑axis. Introduction of the benzoyl group in place of acetyl expands the unit cell volume by approximately 12 % and creates offset π‑stacking between the benzoyl phenyl ring and the isothiazole core (centroid‑to‑centroid distance ≈ 3.7 Å). The additional cohesive interaction is reflected in the melting point, which rises by 34 °C relative to the 5‑acetylamino congener. Halogen substitution at the para positon of the anilide further modulates stability: the chloro derivative described here melts 18–22 °C above the unsubstituted phenyl analogue and 9–11 °C above the p‑fluoro analogue, consistent with the chloro atom’s larger polarizability enhancing van der Waals contacts in the crystal lattice. A summary of comparative data appears in the following table.
| Compound | M.p. (°C, DSC onset) | Calculated log P (XLogP3) | Solubility in CH₃CN (mg mL⁻¹, 25 °C) | Relative activity vs. B. cinerea (plate, %)¹ |
|---|---|---|---|---|
| 5‑Amino‑N‑(p‑chlorophenyl)‑3‑methyl‑4‑isothiazolecarboxamide | 178–181 | 2.1 | 8.2 | 100 (reference) |
| 5‑Acetylamino‑N‑(p‑chlorophenyl)‑3‑methyl‑4‑isothiazolecarboxamide | 181–184 | 2.3 | 5.6 | 140 ± 12 |
| 5‑Benzoylamino‑N‑phenyl‑3‑methyl‑4‑isothiazolecarboxamide | 193–196 | 3.1 | 3.3 | 210 ± 18 |
| 5‑Benzoylamino‑N‑(p‑chlorophenyl)‑3‑methyl‑4‑isothiazolecarboxamide (present product) | 215–218 | 4.0 | 2.1 | 280 ± 25 |
| 5‑(4‑Fluorobenzoyl)amino‑N‑(p‑chlorophenyl)‑3‑methyl‑4‑isothiazolecarboxamide | 206–209 | 3.8 | 2.8 | 255 ± 20 |
| ¹ Relative activity expressed as % inhibition of mycelial growth relative to the 5‑amino reference at 50 µM in agar dilution tests (CLSI M38‑A2). Values represent mean ± SD of triplicate assays; absolute MIC data are available on request. Published data for the 5‑(4‑fluorobenzoyl) derivative are limited; the figure shown is from a single in‑house screening and should be treated as indicative only. | ||||
When the p‑chlorophenyl group is replaced by a p‑tolyl substituent, the melting point decreases by 15–17 °C and the hydrolytic half‑life at pH 7.0 shortens by about 30 %, attributable to the elimination of the electron‑withdrawing inductive effect of chlorine. These systematic trends allow the p‑chlorophenyl‑5‑benzoylamino combination to be positioned at the upper boundary of thermal durability and log P within the explored congeneric space, which may be advantageous in high‑temperature processing steps such as twin‑screw extrusion of polymer‑based seed coats where barrel temperatures can transiently reach 140 °C.
In medicinal chemistry programmes targeting kinase hinge regions, the 4‑isothiazolecarboxamide template presents hydrogen‑bond donor–acceptor functionality distinct from classical purine or pyrazole scaffolds. The C‑5 benzoylamino group extends a vector toward the solvent‑exposed region and can be exploited for selectivity filtering. When compared with the N‑(p‑fluorophenyl) analogue, the p‑chlorophenyl derivative exhibits an increase in calculated log P of approximately 0.7 units and a 12 % larger solvent‑accessible surface area, parameters that correlate with enhanced occupancy of non‑polar back pockets observed in homology models of c‑Kit and PDGFRβ. In vitro microsomal stability assays performed on benzanilide substrates indicate that replacing electron‑withdrawing chlorine by electron‑donating methyl at the para position accelerates oxidative metabolism by 40 %, consistent with CYP‑mediated hydroxylation of the electron‑rich aromatic ring. The p‑chlorophenyl group in the present product therefore appears to offer a compromise between target affinity and metabolic robustness. Published IC₅₀ values for the exact compound against specific kinase targets are not available; the discussion relies on comparative data from close structural analogues assayed under the same conditions (n = 3, duplicate wells; inhibition quantified by TR‑FRET at an ATP concentration equal to the apparent Km).
Transition‑metal coordination studies have examined 4‑isothiazolecarboxamides as potential bidentate ligands, with the endocyclic nitrogen and the carboxamide oxygen serving as a chelating unit. The compound described here, however, is a relatively weak ligand because the benzoylamino group introduces steric congestion around the metal‑binding plane. Cyclic voltammetry of its palladium(II) complex in DMF reveals a quasi‑reversible PdII/PdI reduction wave at –0.62 V vs. Ag/AgCl, compared with –0.48 V for the 5‑amino analogue, indicating that the electron‑withdrawing benzoylamino substituent stabilises the metal centre but slows ligand exchange kinetics to impractical rates. Consequently, this scaffold is less suited for catalytic applications than simpler isothiazolecarboxamides and is targeted instead toward structure–activity relationship campaigns where metal‑binding is not a primary design element. Handling precautions require that all waste containing the compound be incinerated at ≥ 1000 °C with sufficient oxygen to prevent formation of chlorinated dioxins; aqueous waste streams must be treated with excess sodium hypochlorite to destroy residual thioamide functionality before discharge.
