Reaction of a 2-iminothione with dimethyl acetylenedicarboxylate to give a pyridine derivative
作者:Ismail Khattak、Roger Ketcham
DOI:10.1039/c39830000260
日期:——
Reactions of 5-imino-1,3-diphenyl-4-thioxoimidazolidin-2-one (1) and 5-imino-3-phenyl-4-(N-phenylimino)-thiazolidine-2-thione (6) provide 5,7-dihydro-2,3,4-tris(methoxycarbonyl)-5,7-diphenyl-6H-imidazo[4,5-b]-pyridin-6-one (3) and 6,7-dihydro-2,3,4-tris(methoxycarbonyl)-7-phenylthiazolo[4,5-b]pyridine-6-thione (7), respectively, when heated with dimethyl acetylenedicarboxylate.
5-亚氨基-1,3-二苯基-4-硫代氧杂咪唑啉-2-酮(1)和5-亚氨基-3-苯基-4-(N-苯基亚氨基)-噻唑烷-2-硫酮(6)的反应得到5, 7-二氢-2,3,4-三(甲氧基羰基)-5,7-二苯基-6 H-咪唑并[4,5 - b ]-吡啶-6-一(3)和6,7-二氢-2,当与乙炔二羧酸二甲酯一起加热时,分别为3,4-三(甲氧基羰基)-7-苯基噻唑并[4,5- b ]吡啶-6-硫酮(7)。