Enantiopure bicyclic piperidinones: stereoselectivity in lactam enolate alkylations
作者:Andrew G. Brewster、Simon Broady、Catherine E. Davies (née Mills)、Thomas D. Heightman、Stephen A. Hermitage、Mark Hughes、Mark G. Moloney、Gordon Woods
DOI:10.1039/b316037h
日期:——
The synthesis and alkylation of [4.3.0]-bicyclic lactams, derived from 6-oxopipecolic acid, have been investigated. Alkylation can proceed with predominantly exo-diastereoselectivity, but the efficiency of this process depends on the substitution at the hemiaminal ether system. These products can be readily deprotected to give substituted hydroxymethyl lactams in good yield.
已经研究了衍生自6-氧代戊酸的[4.3.0]-双环内酰胺的合成和烷基化。烷基化可以主要通过外非对映选择性进行,但是该过程的效率取决于半胱氨酸醚系统中的取代。这些产物可以容易地脱保护,以高收率得到取代的羟甲基内酰胺。