Enantioselective Synthesis of Highly Functionalized Trifluoromethyl-Bearing Cyclopentenes: Asymmetric [3+2] Annulation of Morita-Baylis-Hillman Carbonates with Trifluoroethylidenemalonates Catalyzed by Multifunctional Thiourea-Phosphines
作者:Hong-Ping Deng、Yin Wei、Min Shi
DOI:10.1002/adsc.201101012
日期:2012.3.16
synthesis of multifunctional thiourea‐phosphines, a catalytic method for the asymmetric [3+2] annulation of Morita–Baylis–Hillmancarbonates with trifluoroethylidenemalonates has been developed, affording highly functionalized trifluoromethyl‐bearing cyclopentenes in excellent yields, high diastereoselectivities and enantioselectivities under mild conditions.
Benzhydryl guanidine derivatives and pharmaceutical compositions
申请人:McNeilab, Inc.
公开号:EP0000952A1
公开(公告)日:1979-03-07
The invention relates to benzhydryl guanidine derivatives having the formula
as defined in claim 1 and pharmaceutical compositions having hypoglycemic activity, containing such benzhydryl guanidine derivatives.
Phosphine-Catalyzed Asymmetric [4+2] Annulation of Vinyl Ketones with Oxindole-Derived α,β-Unsaturated Imines: Enantioselective Syntheses of 2′,3′-Dihydro-1′<i>H</i>-spiro[indoline-3,4′-pyridin]-2-ones
作者:Xiao-Nan Zhang、Gen-Qiang Chen、Xiang Dong、Yin Wei、Min Shi
DOI:10.1002/adsc.201300828
日期:2013.11.25
AbstractA novel asymmetric [4+2] annulation of vinyl ketones with oxindole‐derived α,β‐unsaturated imines has been developed in the presence of a multifunctional thiourea‐phosphine catalyst derived from a natural amino acid, providing the first phosphine‐catalyzed enantioselective synthesis of 2′,3′‐dihydro‐1′H‐spiro[indoline‐3,4′‐pyridin]‐2‐ones in good yields with excellent stereoselectivities under mild conditions.magnified image