9-Thiourea Cinchona alkaloid supported on mesoporous silica as a highly enantioselective, recyclable heterogeneous asymmetric catalyst.
A readily recycled and regenerated heterogeneous catalyst of 9-thiourea epi-quinine supported on mesoporous silica exhibits enhanced enantioselectivity (up to 99.2%) in the asymmetric Friedel-Crafts reaction of imines with indoles.
Yu
Peng
P
Beijing University of Chemical Technology, Beijing 100029, People's Republic of China.
He
Jing
J
Guo
Canxiong
C
D002384:Catalysis; D002930:Cinchona Alkaloids / Q000737:chemistry*; D007097:Imines / Q000737:chemistry; D007211:Indoles / Q000737:chemistry; D011803:Quinine / Q000031:analogs & derivatives*; D012822:Silicon Dioxide / Q000737:chemistry*; D013237:Stereoisomerism; D013890:Thiourea / Q000031:analogs & derivatives* / Q000737:chemistry
D002930:Cinchona Alkaloids; D007097:Imines; D007211:Indoles; D012822:Silicon Dioxide; D011803:Quinine; D013890:Thiourea