Concise, efficient new synthesis of pipercide, an insecticidal unsaturated amide from Piper nigrum, and related compounds
作者:George M. Strunz、Heather Finlay
DOI:10.1016/s0040-4020(01)89414-x
日期:1994.1
Pipercide and piperolein A, unsaturated amides from Piper nigrum, were prepared in overall yields of 21% and 35% respectively, by a new, short and efficient strategy, in which the key step was the aldol-Grob-type fragmentation sequence recently reported by Sakai et al.. (but using propylene- rather than ethylene glycol). The nor-homologues of these natural products were similarly prepared. In the final
通过新的,短而有效的策略,分别从Piper nigrum制备了总产率分别为21%和35%的Pipercide和Piperolein A(不饱和酰胺),其中的关键步骤是最近报道的aldol-Grob型片段化序列。 Sakai等人(但使用丙二醇而不是乙二醇)。这些天然产物的非同源物以类似方式制备。在最后的步骤中,可以通过Roskamp的方法(包括用Sn [N(TMS)2 ] 2和适当的胺处理)直接从酯中制备酰胺,或者通过常规方法从相应的羧酸中制备酰胺。