1998 catalysis, phase-transfer catalysis

catalysis, phase-transfer catalysisO 0020

41 - 026Design and Synthesis of Chiral Ketones for Catalytic AsymmetricEpoxidation of Unfunctionalized Olefins. — A variety of (R)-binaphthyl-based ketones is prepared using ortho-lithiation strategies. Amongthem, title compounds (V) are found to efficiently catalyze the epoxidation ofolefins via dioxirane intermediates. Evidence is provided for a spiro transitionstate of dioxirane epoxidation. — (YANG, D.; WONG, M.-K.; YIP, Y.-C.;WANG, X.-C.; TANG, M.-W.; ZHENG, J.-H.; CHEUNG, K.-K.; J. Am. Chem.Soc. 120 (1998) 24, 5943-5952; Dep. Chem., Univ. Hong Kong, Hong Kong,Peop. Rep. China; EN)

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1998 catalysis, phase-transfer catalysis

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