A short synthetic strategy for 3, 6-disubstituted-N-2-thienyl/aryl-indoles, involving reaction of substituted 2, 4-difluoro/dichloro-styrene epoxide with substituted 2-formylaminothiophenes or substituted N-formylanilines in the presence of a base followed by treatment with an acid, has been developed. The method was applied for the synthesis of a number of indoles with a variety of substituents at 1, 3, and 6 positions of the indole moiety.
[Karki, Rajeshri G.; Gokhale, Vijay M.; Kharkar, Prashant S.; Kulkarni, Vithal M. Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2003 , vol. 42, # 2 p. 372 - 381]
