1,3,5-Triazapenta-1,3-dienes: Useful Building Blocks for the Synthesis of1,2-Dihydro-1,3,5-triazines and Oligonitriles
作者:Nadine Heße、Roland Fröhlich、Birgit Wibbeling、Ernst-Ulrich Würthwein
DOI:10.1002/ejoc.200600352
日期:2006.9
1,3,5-Triazapentadienes 1, prepared from amidines and imidoyl chlorides 2, have been used as nucleophilic building blocks for the reactions with various electrophilic reagents. With aldehydes 4 1,2-dihydrotriazines 3 were obtained, whereas ketones 5 gave 3 or 1,3,5-triazahexa-1,3,5-trienes 6, depending on the substitution pattern of 1. Acyl chlorides 7 reacted with 1 to give 1-oxa-3,5,7-triazahepta-1
由脒和亚氨酰氯 2 制备的 1,3,5-三氮杂戊二烯 1 已被用作与各种亲电试剂反应的亲核结构单元。使用醛 4 得到 1,2-二氢三嗪 3,而酮 5 得到 3 或 1,3,5-三氮杂六-1,3,5-三烯 6,具体取决于 1 的取代模式。酰氯 7 与 1 反应生成得到 1-oxa-3,5,7-triazahepta-1,3,5-trienes 8;以类似的方式,亚胺酰氯 2 形成了新的 1,3,5,7-四氮杂七-1,3,5-三烯 9。用 1 处理 N-苯甲酰苯并亚氨酰氯 10 得到 1-oxa-3 ,5,7,9-tetraazanona-1,3,5,7-四烯 11,或根据取代模式,它们的具有 1,2-二氢三嗪结构的环互变异构化合物 12。1-Oxa-3,5-当用 1g, 1-oxa-3,5,7 处理时,二嗪盐 13 作为环状亲电子试剂产生,9,11-pentaazaundeca-1,3,5,7