在三乙胺的存在下,室温下丙二腈与硫化氢和醛的缩合,得到4-烷基(芳基,杂芳基)-2,6-二氨基-3,5-二氰基-4 H-硫代吡喃。后者在DMF中用碱原位处理,然后添加烷基化剂,导致形成4-烷基(芳基,杂芳基)-2-烷氧基羰基(芳酰基,氨基甲酰基)-3,6-二氨基-5-基氰基噻吩并[2,3- b ]-吡啶。
Transformation of 4-aryl(heteryl)-2,6-diamino-3,5-dicyano-4H-thiopyrans into substituted acrylonitriles, 1,4-dihydropyridines, 2,3,4,7-tetrahydrothiazolo[3,2-a]pyridine, and 4,7-dihydrothieno[2,3-b]pyridine
作者:V. D. Dyachenko
DOI:10.1134/s1070428006050137
日期:2006.5
Cross-recyclization of 4-aryl(heteryl)-2,6-diamino-3,5-dicyano-4H-thiopyrans with alpha-bromoketones or alkyl halides formed substituted 3 -aryl-2-(4-R-thiazol-2-yl)acrylonitriles, 2-alkylsulfanyl-1,4-dihydropyridines, 2,3,4,7-tetrahydrothiazolo[3,2-a]pyridine, and 4,7-dihydrothieno[2,3-b]pyridine.