712273-21-7Relevant articles and documents
Extending Pummerer reaction chemistry. Application to the oxidative cyclization of indole derivatives
Feldman, Ken S.,Vidulova, Daniela Boneva
, p. 1869 - 1871 (2007/10/03)
Matrix presented. Treatment of 2-(phenylsulfinyl)indoles bearing a pendant nucleophile at C(3) with Tf2O/lutidine triggers a Pummerer-like cyclization to furnish 3,3-spirocyclic-2-(phenylthio)indolenine products, which can, in turn, be hydrolyzed to 3,3-spirocyclic oxindoles.