Synthesis of methyl 3-amino-4-aryl(or methyl)sulfonyl-2-thiophenecarboxylates from 3-alkoxy-2-aryl(or methyl)-sulfonylacrylonitriles
作者:Chad E. Stephens、Matthew B. Price、J. Walter Sowell
DOI:10.1002/jhet.5570360314
日期:1999.5
The synthesis of a series of methyl 3-amino-4-aryl(or methyl)sulfonylthiophene-2-carboxylates by reaction of 3-alkoxy-2-aryI(or methyl)sulfonylacrylonitriles with methyl thioglycolate in the presence of triethylamine is described. Hydrolysis/decarboxylation of the ester at the 2-position and acylation of the resulting amine represents a convenient route to 4-arylsulfonyl-3-carboxamidothiophenes. Attempted
描述了在三乙胺存在下,通过3-烷氧基-2-芳基(或甲基)磺酰基丙烯腈与硫代乙醇酸甲酯的反应,合成一系列3-氨基-4-芳基(或甲基)磺酰基噻吩-2-羧酸甲酯。酯在2-位的水解/脱羧和所得胺的酰化代表了形成4-芳基磺酰基-3-羧酰胺基噻吩的便利途径。在标准条件下尝试酰化标题氨基噻吩未成功。