A general organocatalyticenantioselective synthesis of nitrocyclopropanes from bromonitromethane and a variety of cyclic and acyclic enones is described.
描述了从溴硝基甲烷和各种环状和非环状烯酮合成硝基环丙烷的一般有机催化对映选择性合成。
One-pot synthesis of nitrocyclopropane: α-Amylase-catalyzed Michael addition initiated ring-closure sequence reactions
作者:Xue-Dong Zhang、Jian Song、Na Gao、Zhi Guan、Yan-Hong He
DOI:10.1016/j.molcatb.2016.09.006
日期:2016.12
This article presents a one-pot synthesis of nitrocyclopropanes via Michael addition initiated ring closure sequence reactions of bromonitroalkane to alpha,beta-unsaturated enones. Moderate to favorable yields (55-93%) and certain enantioselectivities were obtained with alpha-amylase from hog pancreas as the catalyst. This strategy utilizes the unnatural ability of enzymes to provide a convenient and biocatalytic method for green organic synthesis. (C) 2016 Elsevier B.V. All rights reserved.
Enantioselective Synthesis of Functionalized Nitrocyclopropanes by Organocatalytic Conjugate Addition of Bromonitroalkanes to α,β-Unsaturated Enones
作者:Jian Lv、Jiaming Zhang、Zhu Lin、Yongmei Wang
DOI:10.1002/chem.200801651
日期:2009.1.12
A general enantioselective synthesis of functionalized nitrocyclopropanes by organocatalytic conjugateaddition of a variety of bromonitroalkanes to α,β‐unsaturated enone systems is presented. The process, efficiently catalyzed by the salts of 9‐amino‐9‐deoxyepiquinine 1 d serves as a powerful approach to the preparation of synthetically and biologically important cyclopropanes with high levels of