Asymmetric Epoxidation of 1,4-Naphthoquinones Catalyzed by Guanidine-Urea Bifunctional Organocatalyst.
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DOI: 10.1021/acs.orglett.8b00641
Abstract: An enantioselective nucleophilic epoxidation of 2-substituted 1,4-naphthoquinones in the presence of a newly developed guanidine-bisurea bifunctional organocatalyst with tert-butyl hydroperoxide (TBHP) as an oxidant is presented. 1,4-Naphthoquinones bearing substituents at C6, C7, and C2 were… read more here.
Keywords: asymmetric epoxidation; naphthoquinones catalyzed; epoxidation; bifunctional organocatalyst ... See more keywords