The first Bischler-Napieralski cyclization in a room temperature ionic liquid
Zaher M. A. Judeh*, Chi Bun Ching, Jie Bu and Adam McCluskey
*Chemical and Process Engineering Centre, National University of Singapore, 10 Kent Ridge Crescent, Singapore 117576, Email: zaherntu.edu.sg
Z. M. A. Judeh, C. B. Ching, J. Bu, A. McCluskey, Tetrahedron Lett., 2002, 43, 5089-5091.
The room temperature ionic liquid, 1-butyl-3-methylimidazoliumhexafluorophosphate ([bmim]PF6) is an environmentally benign solvent for the preparation of activated 3,4-dihydroisoquinolines derivatives through Bischler-Napieralski cyclization under mild conditions with excellent purity and yields.
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