Bi(OTf)3-catalyzed conjugate addition of indoles to p-quinones: a facile synthesis of 3-indolyl quinones
摘要:
A wide range of indoles undergo conjugate addition to p-benzoquinones in the presence of 2 mol% bismuth triflate under mild conditions to afford the corresponding 3-indolyl quinones in excellent yields with high selectivity. (C) 2003 Elsevier Ltd. All rights reserved.