Reactions of 4-tosyl-2-phenyl-5-chloro-1,3-thiazole with N-, O-, and S-nucleophiles
摘要:
The accessible two-center electrophilic substrate 4-tosyl-2-phenyl-5-chloro-1,3-thiazole reacts regioselectively with N-, O-, and S-nucleophiles to eliminate a chloride ion. The analog of this substrate, 4-tosyl- 2-phenyl-5-p-chlorophenylsulphonyl-1,3-thiazole, reacts with "soft" and "hard" nucleophiles differently: with the participation of C(5) or C(4) center, respectively, that seems to be caused by the principle of "symbiosis" in the transition state.
Reactions of 4-tosyl-2-phenyl-5-chloro-1,3-thiazole with N-, O-, and S-nucleophiles
作者:K. V. Turov、T. K. Vinogradova、V. S. Brovarets、B. S. Drach
DOI:10.1134/s1070363210040249
日期:2010.4
The accessible two-center electrophilic substrate 4-tosyl-2-phenyl-5-chloro-1,3-thiazole reacts regioselectively with N-, O-, and S-nucleophiles to eliminate a chloride ion. The analog of this substrate, 4-tosyl- 2-phenyl-5-p-chlorophenylsulphonyl-1,3-thiazole, reacts with "soft" and "hard" nucleophiles differently: with the participation of C(5) or C(4) center, respectively, that seems to be caused by the principle of "symbiosis" in the transition state.
Reaction of 1-tosyl-2,2-dichloroenamines with the Lawesson’s reagent
作者:K. V. Turov、T. K. Vinogradova、E. B. Rusanov、V. S. Brovarets
DOI:10.1134/s1070363212050076
日期:2012.5
In the reaction of the available 1-tosyl-2,2-dihlorenamides with the Lawesson’sreagent the derivatives of 4-tosyl-1,3-thiazole were shown to form containing a labile chlorine atom at the C5 position. This fact was used for the synthesis of a number of the previously unknown bifunctionally substituted 4,5-thiazoles.