Optically pure γ-butyrolactones and epoxy esters via two stereocentered HKR of 3-substituted epoxy esters: a formal synthesis of (−)-paroxetine, Ro 67-8867 and (+)-eldanolide
作者:Dattatray A. Devalankar、Pratibha U. Karabal、Arumugam Sudalai
DOI:10.1039/c3ob27321k
日期:——
racemic anti- or syn-3-substituted epoxy esters catalyzed by a Co(III)salen complex provides ready access to the corresponding enantioenriched 3,4-disubstituted γ-butyrolactones and 3-substituted epoxy esters. This strategy has been successfully employed in the formal synthesis of biologically active 3,4-disubstituted piperidine derivatives, (−)-paroxetine and Ro 67-8867 and a natural product, (+)-eldanolide
外消旋的HKR抗-或顺式-3-取代的环氧酯通过将Co(催化III salen络合物)提供到相应的对映体富集3,4-二取代γ丁内酯和3-取代的环氧酯随时获得。该策略已成功用于生物学活性的3,4-二取代哌啶衍生物(-)-帕罗西汀和Ro 67-8867以及天然产物(+)-依加醇化物的形式合成中。