A Comparison of the Photosensitized Rearrangement and the Lewis-Acid-Catalyzed Rearrangement of Spirooxindole Epoxides
作者:Lihong Wang、Yibing Su、Xinmin Xu、Wei Zhang
DOI:10.1002/ejoc.201201020
日期:2012.10.5
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 Cα–O bond followed by alkyl migration. The SnCl4-catalyzed rearrangement of spirooxindole