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卷 14, 期 20, 页码 5266-5269出版社
AMER CHEMICAL SOC
DOI: 10.1021/ol302425h
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The [3 + 2] dipolar cycloaddition reaction of nitrite imines with 3-alkylidene oxindoles is described. The pyrazoline spiroadducts were obtained in high yields and with excellent regio- and diastereoselectivities. These spirocyclic intermediates have been elaborated to synthetically versatile 3-amino oxindole building blocks such as beta-amino nitrile, 1,3-diamine, and pyrrolo[2,3-b]indoline derivatives.
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