1-Alkoxyamino-2-nitroalkanes as Key Building Blocks for a Chemo- and Diastereoselective Synthesis of a New Type of Polyfunctionalized N-Alkoxypiperidine
作者:M. Ángeles López-García、Inés Maya、José G. Fernández-Bolaños、Giovanna Bosica、Roberto Ballini
DOI:10.1002/ejoc.201000540
日期:——
A highly efficient conversion of β-nitrostyrenes into a new kind of functionalized N-alkoxy-2-hydroxypiperidine in two steps was developed, giving excellent yields and diastereoselectivity. The prepared compounds are the first examples of N-alkoxy-2-hydroxypiperidines. The synthetic approach involved the conjugate addition of alkoxyamines to β-nitrostyrenes, followed by Michael addition of the isolated
开发了一种分两步高效将 β-硝基苯乙烯转化为新型官能化 N-烷氧基-2-羟基哌啶的方法,具有优异的产率和非对映选择性。制备的化合物是N-烷氧基-2-羟基哌啶的第一个实例。合成方法包括烷氧基胺与 β-硝基苯乙烯的共轭加成,然后分离的硝基烷氧基胺与 α,β-不饱和羰基化合物的迈克尔加成,以及烷氧基氨基与(非分离的)羰基官能团的分子内加成。 ) 加合物。尽管形成了三个立体中心,但仅检测到一种非对映异构体。这种前所未有的反应序列也可以以一锅法进行。