First Example of Functionalization of Activated Quinolines by Indoles Using CeCl<sub>3</sub>·7H<sub>2</sub>O
作者:J. S. Yadav、B. V. Reddy、K. Sathaiah、P. Vishnumurthy
DOI:10.1055/s-2005-918930
日期:——
Indoles undergo smooth addition to activated quinolines and isoquinolines in the presence of CeCl3·7H2O under extremely mild conditions to provide 2-(1H-3indolyl)-1,2-dihydroquinolines and isoquinolines in excellent yields with high selectivity. It is entirely a new protocol to functionalize both indoles and quinolines in a single-step operation.
Addition of indoles and pyrroles to activated quinolines and isoquinolines is achieved using 10 mol% of indium(III) chloride as a catalyst to produce 2-(1H -indol-3-yl)-1,2 -dihydroquinolines and l-(1H -indol-3-yl)-1,2 -dihydroisoquinolines in excellent yields with high selectivity. This method is very useful for the functionalization of both indoles and quinolines in a one-pot operation.