Synthesis of 3-alkoxycarbonylaminomethylcarbonylamino-4-benzoyl-1,2-dihydropyridines and their cyclization to 5-phenyl-1,3,8,9-tetrahydro-2<i>H</i>-pyrido[3,4-<i>e</i>]-1,4-diazepin-2-ones
作者:Charles Y. Fiakpui、Vinod K. Arora、Edward E. Knaus
DOI:10.1002/jhet.5570300320
日期:1993.5
9-tetrahydro-2H-pyrido[3,4-e]-1,4-diazepin-2-ones 8a, 8b, 8c, 8d respectively in 45–63% yield. N1-Methylation of 5-phenyl-8-acetyl-9-n-butyl (or phenyl)-1,3,8,9-tetrahydro-2H-pyrido[3,4-e]-1,4-diazepin-2-ones 8a, 8b using sodium hydride and iodomethane yielded the corresponding N1-methyl derivatives 9a (48%) and 9b (54%). Oxidation of 5,9-diphenyl-8-ethoxycarbonyl-1,3,8,9-tetrahydro-2H-pyrido[3,4-e]-1,4-diazepin-2-one
3-苄氧基羰基氨基甲基羰基氨基-4-苯甲酰基吡啶(6a)或3-叔丁氧基羰基氨基甲基羰基氨基-4-苯甲酰基吡啶(6b)与乙酰氯或氯甲酸乙酯和正丁基氯化镁或苯基溴化镁的区域特异性反应得到相应的1 -乙酰基(或乙氧基羰基)-2-正丁基(或苯基)-3-苄氧基(或叔丁氧基)羰基氨基甲基羰基-氨基-4-苯甲酰基-1,2-二氢吡啶7,收率为60-75%。1-乙酰基(或乙氧基羰基)-2-正丁基(或苯基)-3-叔丁氧基羰基氨基甲基羰基-4-苯甲酰基-1,2-二氢吡啶的反应7b,7f,7d,7h用三氟乙酸制得相应的5-苯基-8-乙酰基(或乙氧羰基)-9-正丁基(或苯基)-1,3,8,9-四氢-2 H-吡啶基[ 3,4- e ] -1,4-diazepin-2-ones 8a,8b,8c,8d的产率分别为45-63%。5-苯基-8-乙酰基-9-正丁基(或苯基)-1,3,8,9-四氢-2 H-吡啶并[3,4- e