Chiral squaramide-catalyzed highly diastereo- and enantioselective direct Michael addition of nitroalkanes to nitroalkenes
作者:Wen Yang、Da-Ming Du
DOI:10.1039/c1cc15946a
日期:——
efficient highlydiastereo- and enantioselective direct Michaeladdition of nitroalkanes to nitroalkenes catalyzed by chiral squaramide catalyst has been developed. This organocatalytic reaction with a low catalyst loading (2 mol%) proceeded well to afford synthetically useful 1,3-dinitro compounds in high yields with high diastereoselectivities (up to 95 : 5 dr) and excellent enantioselectivities (up to
Asymmetric Michael Addition of Nitroalkanes to Nitroalkenes Catalyzed by<i> C</i><sub>2</sub>-Symmetric Tridentate Bis(oxazoline) and Bis(thiazoline) Zinc Complexes
作者:Shao-Feng Lu、Da-Ming Du、Jiaxi Xu、Shi-Wei Zhang
DOI:10.1021/ja0604008
日期:2006.6.1
The first asymmetric synthesis of 1,3-dinitro compounds through Michael addition of nitroalkanes to nitroalkenes catalyzed by C2-symmetricchiral tridentate bis(oxazoline) and bis(thiazoline) zinc complexes was achieved with high enantioselectivities (up to 95% ee).