Synthesis of N-Arylsulfonyl-α-thienylglycines from N-(2,2,2-Trichloro-1-thienylethyl)arenesulfonamides
作者:Yu. A. Aizina、I. B. Rozentsveig、I. V. Ushakova、G. G. Levkovskaya、A. N. Mirskova
DOI:10.1007/s11178-005-0126-x
日期:2005.1
Reactions of N-(2,2,2-trichloroethylidene)arenesulfonamides with thiophene, 2-chlorothiophene, and 2,5-dichlorothiophene, as well as of N-(2,2,2-trichloro-1-hydroxyethyl)arenesulfonamides with 2-chlorothiophene, lead to formation of the corresponding N-(2,2,2-trichloro-1-thienylethyl)arenesulfonamides. Alkaline hydrolysis of the latter occurs selectively at the trichloromethyl group to give N-arylsulfonyl-α-thienylglycines.
N-(2,2,2-三氯乙烯基)芳基磺酰胺与噻吩、2-氯噻吩和2,5-二氯噻吩的反应,以及N-(2,2,2-三氯-1-羟基乙基)芳基磺酰胺与2-氯噻吩的反应,导致相应的N-(2,2,2-三氯-1-噻吩乙基)芳基磺酰胺的形成。后者的碱性水解选择性地发生在三氯甲基基团上,生成N-芳基磺酰-α-噻吩基甘氨酸。