期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 72, 期 22, 页码 8597-8599出版社
AMER CHEMICAL SOC
DOI: 10.1021/jo701606u
关键词
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The cycloaddition of nitrones and enantiomerically pure cyclopropane-1,1-dicarboxylates is examined. Transfer of optical activity to the adduct is dictated by thermal reaction conditions and nature of cyclopropane substitution. Optically active 2-substituted cyclopropane-1,1-dicarboxylates are shown to racemize under typical reaction conditions, providing evidence for a zwitterionic ring-opened intermediate.
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