Asymmetric 1, 4-additions to 5-alkoxy-2 (5H)-furanonesenantioselective synthesis and absolute configuration determination of β-amino-δ-butyrolactones and amino diols
作者:B. de Lange、F. van Bolhuis、Ben L. Feringa
DOI:10.1016/s0040-4020(01)89149-3
日期:1989.1
es via asymmetric conjugate addition of various amines to 5-menthyloxy-2(5H)-furanone is described. This route provides access to new multifunctionalhomochiral building blocks. The absolute configuration of the β-amino-δ-butyrolactones is established by X-ray analysis and 1H NMR correlation. Theconjugate addition of amines to 2[5H]-furanone, 5-alkyl-2[5H]-furanones and 5-alkoxy-2[5H]-furanones was
描述了通过将各种胺不对称共轭加成到5-薄荷基氧基-2(5H)-呋喃酮中来合成对映体纯的β-氨基-δ-丁内酯。这条路线提供了通往新的多功能同构构件的途径。通过X射线分析和1 H NMR相关性确定了β-氨基-δ-丁内酯的绝对构型。研究了将胺共轭添加到2 [5H]-呋喃酮,5-烷基-2 [5H]-呋喃酮和5-烷氧基-2 [5H]-呋喃酮中,并观察到由于2 [5H]-呋喃酮具有增强的反应性,这是由于γ-烷氧基效应。不对称胺加成的合成效用以有效途径说明了各种光学纯的2-氨基-1,4-丁二醇的合成。