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[摘要]：Spirooxindole epoxides undergo smooth rearrangement either under photosensitization conditions or under Lewis acid catalysis to give different products. The photosensitized rearrangement of spirooxindole epoxides leads to 3-acyl-2-indolones, such as spiro[cycloalkane-1,3'-indolin]-2,2'-diones, by cleavage of the CaO bond followed by alkyl migration. The SnCl4-catalyzed rearrangement of spirooxindole epoxides gives 4,4-dialkylquinolin-2,3-diones, such as spiro[cycloalkane-1,4'-quinolin]-2',3'-diones, by cleavage of the C beta O bond followed by aryl migration. |
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