Chiral Cyclopropenimine‐catalyzed Asymmetric Michael Addition of Bulky Glycine Imine to α,β‐Unsaturated Isoxazoles
作者:Yu‐Jun Bai、Mei‐Ling Cheng、Xiao‐Hui Zheng、Sheng‐Yong Zhang、Ping‐An Wang
DOI:10.1002/asia.202200131
日期:2022.6
A highly efficient asymmetric Michaeladdition of bulky glycine imine to α,β-unsaturated isoxazoles has been achieved by using 5 mol% of chiral cyclopropenimine (CSB-1) as a chiral organosuperbase catalyst under mild conditions to provide Michael adducts in excellent yields and stereoselectivities.
Herein we describe the preparation of a novel class of isoxazolyl aziridines. The products were obtained exclusively as cis diastereoisomers. (C) 2008 Elsevier Ltd. All rights reserved.
DBU-catalyzed Michael addition of bulky glycine imine to α,β-unsaturated isoxazoles and pyrazolamides
Reaction of 5-(1-bromo-2-aryl-vinyl)-3-methyl-4-nitro-isoxazoles and 1,3-dicarbonyl compounds
作者:Mauro F.A. Adamo、Surisetti Suresh、Linda Piras
DOI:10.1016/j.tet.2009.04.058
日期:2009.7
The preparation of E-5-(1-bromo-2-aryl-vinyl)-3-methyl-4-nitro-isoxazoles and their reaction with 1,3-dicarbonyl compounds to give cyclopropanes or dihydrofurans is described. (C) 2009 Elsevier Ltd. All rights reserved.