Journal
ADVANCED SYNTHESIS & CATALYSIS
Volume 347, Issue 6, Pages 867-871Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.200404349
Keywords
calcium chloride; Michael reaction; (R)-octahydro-BINOL; (H-8-BINOL); quaternary stereocenter
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An efficient catalyst for the creation of a quaternary stereocenter has been developed utilizing easily available, eco-friendly CaCl2 and applied for enantioselective carbon-carbon bond forming reactions. Among the surveyed ligands, it was found that (R)-5,5',6,6',7,7',8,8'-octahydro-BINOL-Ca (2f) gave maximum ee (72%) with excellent yields.
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