作者:Shangde Jin、Pablo Wessig、Jürgen Liebscher
DOI:10.1002/(sici)1099-0690(200005)2000:10<1993::aid-ejoc1993>3.0.co;2-i
日期:2000.5
Treatment of 3-alkylidene or 3-benzylidene-2,5-piperazinediones 6 with catalytic amounts of acid gives rise to the formation of isomers 7 by migration of the CC bond into the alkyl substituent at position 6, or results in mixtures of racemic 7 and E isomers 8. The existence of tautomeric equilibria is discussed.
用催化量的酸处理 3-亚烷基或 3-亚苄基-2,5-哌嗪二酮 6,通过 CC 键迁移到 6 位的烷基取代基中形成异构体 7,或导致外消旋体 7 的混合物和 E 异构体 8. 讨论了互变异构平衡的存在。