Domino Carbocationic Rearrangement of α-[Bis(methylthio)methylene]alkyl-2-(3/2-indolyl) Cyclopropyl Ketones

Abstract

Domino carbocationic rearrangement of a number of substituted 3- and 2-indolylcyclopropyl ketones with an alpha-bis(methylthio)methylene group in the presence of various protic/Lewis acids yields a variety of products, mainly the pentaleno fused indoles and the carbazole derivatives.