A Facile and Rapid Route to a New Series of Pyrrolizidines Structurally Related to (+)-Alexine and (+)-Australine
作者:Jean-Bernard Behr、Audrey Erard、Georges Guillerm
DOI:10.1002/1099-0690(200204)2002:7<1256::aid-ejoc1256>3.0.co;2-r
日期:2002.4
Addition of allylmagnesium chloride to protected L-xylofuranosylamine gave, after intramolecular cyclization, the corresponding polyhydroxylated 2-allylpyrrolidines. New series of analogues of (+)-alexine and (+)-australine were readily obtained from these intermediates by dihydroxylation, intramolecular nucleophilic displacement and subsequent deprotection. The determination of the configuration at
在分子内环化后,将烯丙基氯化镁加到被保护的L-木呋喃糖基胺中,得到相应的多羟基化的2-烯丙基吡咯烷。通过二羟基化,分子内亲核取代和随后的脱保护作用,可以很容易地从这些中间体中获得新的(+)-alexine和(+)-australine系列类似物。基于NMR实验确定在新形成的立体中心的构型。(©Wiley-VCH Verlag GmbH,69451 Weinheim,Germany,2002)