作者:Walter Fuhrer、Vittorio Rasetti、Grety Rihs
DOI:10.1002/hlca.19850680520
日期:1985.8.14
and subsequent treatment of the intermediate 2 with an amine, or more directly by acid-catalyzed condensation of the Schiff bases derived from acetophenone with 2-ethoxy-1-pyrroline. Nitrosation of these vinamidines led to α,α′-diimino-oximes. In two cases (10, 11), these oximes underwent acid-catalyzed rearrangement with formation of a 5,6,7,8-tetrahydroimidazo[1,2-a]pyridine ring system (12, 13)
2- [2-(烷亚氨基)-2-苯基亚乙基]吡咯烷(vinamidines,3 - 6)中任一获得经由相应vinologous酰胺活化1与米尔文盐以及中间的后续处理2与胺,或更直接地通过苯乙酮的席夫碱与2-乙氧基-1-吡咯啉的酸催化缩合。这些钒胺的亚硝化产生α,α′-二亚氨基肟。在两种情况下(10,11),这些肟经历酸催化的重排形成5,6,7,8-四氢咪唑并[1,2的一个]吡啶环系(12,13)。提供了这些产物之一(13)和一种Viannaidine盐(6)的X射线分析。