An end-game strategy for construction of the G-H-I rings of penitrem D, A tremorgenic indole alkaloid
作者:Amos B. Smith、Mitsuaki Ohta、William M. Clark、James W. Leahy
DOI:10.1016/s0040-4039(00)93371-9
日期:1993.5
synthetic approach to the G-H-I ring system of penitrem D has been developed in a model study. To generate the requisite carbon framework, the Stork protocol was utilized for coupling of a scalemic metalloenamine with an epoxide derived from D-glyceraldehyde. Pyran ring formation was then effected via BF3·OEt2-promoted cyclization of a δ-hydroxy allylic acetate.
在模型研究中,已开发出一种综合的方法来合成Penitrem D的GHI环系统。为了生成必要的碳骨架,利用Stork方案将鳞状金属烯胺与衍生自D-甘油醛的环氧化物偶联。然后通过BF 3 ·OEt 2促进的δ-羟基烯丙基乙酸酯的环化作用实现吡喃环的形成。