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Silica gel supported bis-cinchona alkaloid: a highly efficient chiral ligand for heterogeneous asymmetric dihydroxylation of olefins

✍ Scribed by Choong Eui Song; Jung Woon Yang; Hyun-Joon Ha

Book ID: 104361102
Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 228 KB
Volume: 8
Category: Article
ISSN: 0957-4166
DOI: 10.1016/s0957-4166(97)00074-8

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✦ Synopsis

Comparable reactivity and enantioselectivity to those in homogeneous solution have been achieved in heterogeneous catalytic asymmetric dihydroxylation (AD) of olefins using a new silica gel supported cinchona alkaloid containing 1,4-bis(9-Oquininyl)phthalazine ((QN)2-PHAL). Moreover, the silica supported alkaloid exhibited much greater binding ability for OsO4 than its homogeneous analogue. (~) 1997 Elsevier Science Ltd. All rights reserved.

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