A Short, Organocatalytic Formal Synthesis of (−)-Swainsonine and Related Alkaloids
作者:Vijay Dhand、Jason A. Draper、Jarod Moore、Robert Britton
DOI:10.1021/ol400566j
日期:2013.4.19
A shortsynthesis of hydroxyalkyl dihydropyrroles has been developed that involves the coupling of propargylamines with α-chloroaldehydes, followed by Lindlar reduction and a one-pot epoxide formation/opening sequence. The application of this process to the synthesis of unnatural iminosugars and a formalsynthesis of (−)-swainsonine is described.
Enantioselective N-Heterocyclic Carbene-Catalyzed Synthesis of Trifluoromethyldihydropyridinones
作者:Dong-Ling Wang、Zhi-Qin Liang、Kun-Quan Chen、De-Qun Sun、Song Ye
DOI:10.1021/acs.joc.5b00232
日期:2015.6.5
The enantioselectiveN-heterocycliccarbene-catalyzed [4 + 2] cyclocondensation of α-chloroaldehydes and trifluoromethyl N-Boc azadienes was developed, giving the corresponding 3,4-disubstituted-6-trifluoromethyldihydropyridin-2(1H)-ones in good yields with exclusive cis-selectivities and excellent enantioselectivities.
N-Heterocyclic carbene-catalyzed [4 + 2] cyclization of α-chloroaldehydes and aurones: Highly enantioselective synthesis of benzofuran-fused dihydropyran-2-ones
作者:Yao Li、Kunquan Chen、Yan Zhang、Dequn Sun、Song Ye
DOI:10.1016/j.cclet.2018.03.003
日期:2018.8
The chiral N-heterocyclic carbene-catalyzed [4 +2] annulation of alpha-chloroaldehydes and aurones was developed, giving the corresponding benzofuran-fused dihydropyranones in good to high yields with good diastereoselectivities and excellent enantioselectivities. The catalytic cycle features with the generation of enolate from chloroaldehdye and its following [4 + 2] cycloaddtion with aurones. (C) 2018 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.