One pot synthesis of fused [1,2-a]pyrrole from 1,6-dioxo-2,4-diene and haloalkyl primary amine
作者:Shyh-Shiann Juang、Michael Chang、Long Fu Wang、Jeng Liang Han、Chi Wi Ong
DOI:10.1016/j.tet.2004.12.051
日期:2005.2
The one pot synthesis of fused 2,3-dihydropyrrolizine 4a and 6,7-dihydro-5H-indolizine 4b involving the intermolecular dehydrative condensation of 1-phenyl-1,6-dioxo-hepta-2,4-diene 1 with 2-chloroethylamine and 3-chloropropylamine followed by the intramolecular cyclization of the intermediary products 2-(1-chloroalkyl-5-methylpyrrol-2-yl)-1-phenylethanones 3a,b in the presence of a base such as Na2CO3
一锅合成2,3-二氢吡咯烷嗪4a和6,7-二氢-5 H-吲哚嗪4b的合成方法涉及1-苯基1,6,2-二氧-庚2-2,4-二烯1与2的分子间脱水缩合。-chloroethylamine和3-氯丙胺,接着由中间产物的分子内环化2-(1-氯代-5-甲基吡咯-2-基)-1-苯乙酮3A,b在碱的存在下,如Na 2 CO 3和描述了NaHCO 3。这些还导致同时形成氧化二聚产物2,3-双-[1,5-(2-氯烷基)-1 - H-吡咯-2-基] -1,4-二苯基丁烷-1,4-二酮如图5a,b所示,通过X射线分析进一步确认了结构。