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Asymmetric tandem Michael addition/oxidation of pyrazolones with p-benzoquinone catalyzed by cinchona alkaloids

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Indexed by:Journal Papers

Date of Publication:2015-12-15

Journal:TETRAHEDRON-ASYMMETRY

Included Journals:SCIE、Scopus

Volume:26

Issue:23

Page Number:1382-1387

ISSN No.:0957-4166

Abstract:By employing a natural cinchona alkaloid as a catalyst, the enantioselective tandem Michael addition/oxidation of 4-substituted pyrazol-5-ones with p-benzoquinones was realized. The reaction afforded a wide range of 4,4-disubstituted pyrazol-5-ones with moderate to good yields (up to 72%) and moderate to good enantioselectivities (up to 99%). (C) 2015 Elsevier Ltd. All rights reserved.

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