Preparation and properties of 2-methyl-4-tosyl-1,3-thiazole-5-sulfonyl chloride
摘要:
Chlorination of readily available 2-methyl-5-methylsulfanyl-4-tosyl-1,3-thiazole has afforded 2-methyl-4-tosyl-1,3-thiazole-5-sulfonyl chloride. The latter can react with amines to build sulfonamides, efficient electrophilic reagents capable of undergoing nucleophilic substitution reactions. Regiochemistry of the described reactions depends strongly on the nature of nucleophiles, used for regioselective synthesis of some previously unknown trisubstituted 1,3-thiazoles.
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.