期刊
CHEMICAL COMMUNICATIONS
卷 52, 期 77, 页码 11575-11578出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cc05838h
关键词
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A diastereoselective, DABCO-catalyzed reaction of isatin-derived ketimines with allenoates is described. Exploiting the stereodirecting effect of the bulky tert-butanesulfinyl chiral auxiliary, the method provides an efficient access to single diastereoisomers of unprecedented spirocyclic oxindoles, bearing a 4-methyleneazetidine ring at the spiro junction. The versatility of the method is fully demonstrated by further transformations including the conversion to relevant spirocyclic oxindolo-beta-lactams.
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