期刊
ORGANIC LETTERS
卷 11, 期 18, 页码 4224-4227出版社
AMER CHEMICAL SOC
DOI: 10.1021/ol901679h
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-
资金
- Taiwan National Science Council [NSC-94-2113-M-415-003]
Vinylogous urethanes derived from condensation of prolinol or prolinol tert-butyldimethylsilyl ether with 4-allyloxyketoester were found to undergo a thermal [3,3]-sigmatropic rearrangement, providing compounds with N-substituted quaternary carbon centers. Cyclizations (subsequently or in situ) of the rearranged products generated hexahydro-3,4-dioxa-8a-aza-as-indacen-2-ones. Various terminally substituted allyloxy ketoesters; and arylmethoxy ketoesters were found to generate tricyclic compounds via [1,3]-sigmatropic rearrangement. Finally, tricyclic lactones were transformed successfully into lactams.
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