The rearrangement of some cyclopentanone-aryloximes: synthesis of (±)-aplysin, (±)-filiformin and of their debromo analogues.
作者:J.Yves Laronze、Rachida El Boukili、Dominique Patigny、Seloua Dridi、Dominique Cartier、Lean Lévy
DOI:10.1016/s0040-4020(01)96049-1
日期:1991.1
stereoselective equilibration-reductive alkylation of the epimeric mixture of lactols 22a,b. Two routes, one of which was stereospecific, allowed cyclization of 29 to (±)-aplysin 34. The yield was 2.5 % from oximes 2a,b. The isomeric epi-aplysin 35 and filiformin 36 were also obtained from 29. The debromo analogues 37,38 and 39 and their trideutero derivatives 41,42 and 43 were synthesized along similar
一旦Sheradsky之后酸催化重排,所述aryloximes甲得到三环缩醛胺Ç,遭受水解乳醇È。然后通过乳糖醇22a,b的差向异构体混合物的高度立体选择性平衡-还原烷基化来制备独特的醇29。两条途径,其中一条是立体定向的,允许29环化为(±)-aplysin 34。肟2a,b的产率为2.5%。还从29获得同分异构的Epi- aplysin 35和Filiformin 36。溴代类似物37,38沿相似的路线合成了α和39以及它们的三氘代衍生物41,42和43,并通过NMR光谱明确了结构。