Preparation of differentially 1,3-disubstituted indolines by intramolecular carbolithiation
作者:William F. Bailey、Matthew R. Luderer、Michael J. Mealy
DOI:10.1016/s0040-4039(03)01204-8
日期:2003.7
The ether-soluble dilithio species (2), derived from N-allyl-2-bromoaniline (1) upon treatment with t-BuLi at -78degreesC, cyclizes when warmed to +5degreesC in the presence of TMEDA to give a (l-lithio-3-indolinyl)methyllithium (3) that may be differentially functionalized by sequential addition of electrophiles. The cyclization of 2 to 3 proceeds enantioselectively when conducted in the presence of (1S,2S)-(+)-N,O-dimethylpseudoephedrine. (C) 2003 Elsevier Science Ltd. All rights reserved.