Oxa-Michael addition promoted by the aqueous sodium carbonate
摘要:
An efficient Michael addition of alcohols to activated alkenes promoted by sodium carbonate with water as reaction medium has been developed. The reaction provides a general, economical and environmentally friendly approach for the synthesis of beta-alkoxycarbonyl compounds. (C) 2014 Elsevier Ltd. All rights reserved.
Oxa-Michael addition promoted by the aqueous sodium carbonate
作者:Shi-Huan Guo、Sheng-Zhu Xing、Shuai Mao、Ya-Ru Gao、Wen-Liang Chen、Yong-Qiang Wang
DOI:10.1016/j.tetlet.2014.10.019
日期:2014.12
An efficient Michael addition of alcohols to activated alkenes promoted by sodium carbonate with water as reaction medium has been developed. The reaction provides a general, economical and environmentally friendly approach for the synthesis of beta-alkoxycarbonyl compounds. (C) 2014 Elsevier Ltd. All rights reserved.
Asymmetric Syntheses of Amaryllidaceae Alkaloids (−)-Crinane and (+)-4a-Dehydroxycrinamabine
作者:Ya-Ru Gao、Da-Yu Wang、Yong-Qiang Wang
DOI:10.1021/acs.orglett.7b01486
日期:2017.7.7
allyl–allyl cross-coupling reaction to construct the chiral quaternary carbon center of crinane alkaloids has been developed. On the basis of an efficient approach, the enantioselective synthesis of (−)-crinane (1) is presented, and the first asymmetric totalsynthesis of (+)-4a-dehydroxycrinamabine (2) was achieved by subsequent oxidation, 1,4-conjugate addition, RCM reaction, reductive amination,