期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 6, 期 6, 页码 1108-1113出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b800857b
关键词
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N-Heterocyclic carbenes promote the formal [2+2] cycloaddition of ketenes with N-tosyl imines to give the corresponding beta-lactams in good to excellent isolated yields; chiral NHCs give beta-lactams in high e. e. after crystallisation.
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