Asymmetric dihydroxylation of olefins using cinchona alkaloids on highly ordered inorganic supports.
[reaction: see text] A modified cinchona alkaloid was grafted onto a mesoporous molecular sieve and onto amorphous silica gel. These heterogeneous ligands were employed in the asymmetric dihydroxylation of olefins under Sharpless conditions. The supported ligands yielded equivalent enantioselectivity compared with that of the homogeneous system and were easily recovered and reused.
Motorina
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Department of Chemistry, University of New Brunswick, P.O. Box 45222, Fredericton, New Brunswick E3B 6E2, Canada.
Crudden
C M
CM
D000475:Alkenes / Q000737:chemistry*; D002930:Cinchona Alkaloids / Q000737:chemistry*; D006900:Hydroxylation; D058428:Silica Gel; D012822:Silicon Dioxide / Q000737:chemistry; D013237:Stereoisomerism
D000475:Alkenes; D002930:Cinchona Alkaloids; D058428:Silica Gel; D012822:Silicon Dioxide