δ-Amino β-Keto Esters, a Designed Polyfunctionalized Chiral Building Block for Alkaloid Synthesis. Asymmetric Synthesis of (<i>R</i>)-(+)-2-Phenylpiperidine and (−)-SS20846A
作者:Franklin A. Davis、Bin Chao、Tianan Fang、Joanna M. Szewczyk
DOI:10.1021/ol005580j
日期:2000.4.1
[formula: see text] delta-Amino beta-keto esters 3 and 11 are designed polyfunctionalized chiral building blocks for alkaloid synthesis and are prepared in one step from the corresponding sulfinimine (N-sulfinyl imine). Concise highly enantioselective four-step syntheses of 2-phenylpiperidine (7) and SS20846A (14) from 3 and 11, respectively, are described.
[公式:见正文]δ-氨基β-酮酸酯3和11是为生物碱合成设计的多官能手性结构单元,由相应的亚磺胺(N-亚磺酰基亚胺)一步制备。分别描述了分别由3和11合成的2-苯基哌啶(7)和SS20846A(14)的简明高对映选择性四步合成方法。