The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.81449-93-6, Name is Ethyl 2-chlorothiazole-5-carboxylate, molecular formula is C6H6ClNO2S. In a Article£¬once mentioned of 81449-93-6, category: thiazole
The photochemical reaction between ethyl 2-chlorothiazole5-carboxylate and benzene gave no product. In contrast, the reaction with ethyl 2-iodothiazole-5-carboxylate gave ethyl 3-phenylisothiazole-4-carboxylate. The same behaviour was observed if the reaction was performed in the presence of furan, thiophene and 2-bromothiophene. The products thus obtained were studied for their photophysical properties and it was found that the observed absorptions [lambdamax=257 nm (epsilon = 7000 M-1 cm -1) for ethyl 3-phenylisothiazole-4-carboxylate, 278 nm (epsilon = 7000 M-1 cm-1) for ethyl 3-(2-furyl)isothiazole- 4carboxylate, 269 and 285 nm (epsilon = 7500M-1Cm-1) for ethyl 3(2-thienyl)isothiazole-4-carboxylate] are mainly due to pi ? pi* transitions from the HOMO to the LUMO+1 orbital. The tested compounds showed fluorescence [lambdaem = 350-400 (lambdaexc = 300 nm), 360 and 410 nm (lambdaexc = 320 nm), 412 nm (lambdaexc = 340 nm) for ethyl 3-phenylisothiazole-4- carboxylate, 397 and 460 nm (lambdaexc = 300 nm), 381, 394 and 460 nm (lambdaexc = 320 nm), 381, 398 and 466 nm (lambda exc, = 340 nm) for ethyl 3-(2-furyl)isothiazole-4-carboxylate, 372, 377 and 414 nm (lambdaexc = 300, 320 and 340 nm respectively) for ethyl 3-(2-thienyl)isothiazole-4carboxylate], possibly due to dual emission from different excited states. The use of the compound obtained as a sensitizer in the photo-oxidation of trans-alpha,alpha’-dimethylstilbene showed that all the new compounds are singlet-oxygen sensitizers.
The photochemical reaction between ethyl 2-chlorothiazole5-carboxylate and benzene gave no product. In contrast, the reaction with ethyl 2-iodothiazole-5-carboxylate gave ethyl 3-phenylisothiazole-4-carboxylate. The same behaviour was observed if the reaction was performed in the presence of furan, thiophene and 2-bromothiophene. The products thus obtained were studied for their photophysical properties and it was found that the observed absorptions [lambdamax=257 nm (epsilon = 7000 M-1 cm -1) for ethyl 3-phenylisothiazole-4-carboxylate, 278 nm (epsilon = 7000 M-1 cm-1) for ethyl 3-(2-furyl)isothiazole- 4carboxylate, 269 and 285 nm (epsilon = 7500M-1Cm-1) for ethyl 3(2-thienyl)isothiazole-4-carboxylate] are mainly due to pi ? pi* transitions from the HOMO to the LUMO+1 orbital. The tested compounds showed fluorescence [lambdaem = 350-400 (lambdaexc = 300 nm), 360 and 410 nm (lambdaexc = 320 nm), 412 nm (lambdaexc = 340 nm) for ethyl 3-phenylisothiazole-4- carboxylate, 397 and 460 nm (lambdaexc = 300 nm), 381, 394 and 460 nm (lambdaexc = 320 nm), 381, 398 and 466 nm (lambda exc, = 340 nm) for ethyl 3-(2-furyl)isothiazole-4-carboxylate, 372, 377 and 414 nm (lambdaexc = 300, 320 and 340 nm respectively) for ethyl 3-(2-thienyl)isothiazole-4carboxylate], possibly due to dual emission from different excited states. The use of the compound obtained as a sensitizer in the photo-oxidation of trans-alpha,alpha’-dimethylstilbene showed that all the new compounds are singlet-oxygen sensitizers.
The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 81449-93-6 is helpful to your research., category: thiazole
Reference£º
Thiazole | C3H8116NS – PubChem,
Thiazole | chemical compound | Britannica