作者:Xavier L. M. Despinoy、Hamish McNab
DOI:10.1039/b910199c
日期:——
catalysts. Good diastereoselectivity (up to >97:3, depending on catalysts and solvent) can be achieved if the pyrrolizin-3-one is substituted at the 1- (or 7-) position(s), but the selectivity is reduced if both positions are substituted. Subsequent deoxygenation of the pyrrolizidin-3-ones provides concise, diastereoselective routes to the necine bases (±)-heliotridane 5, (±)-isoretronecanol 6 and (±)retronecanol
在非均相催化剂的存在下,吡咯嗪-3-酮(例如1)可以很容易地氢化成它们的六氢(吡咯并嗪-3-酮)衍生物。如果吡咯烷嗪-3-酮在1-(或7-)位置被取代,则可以实现良好的非对映选择性(取决于催化剂和溶剂,可达> 97:3),但是如果两个位置均被降低,则选择性降低被取代。吡咯嗪3-3-酮的随后脱氧提供了简明的,非对映选择性的途径,从而形成了烟碱(±)-硫代三烷5,(±)-异戊烯醇6和(±)丁烯醇7。