作者:Leon Smith、Alexander S. Kiselyov
DOI:10.1016/s0040-4039(99)01122-3
日期:1999.7
We describe a new and efficient synthesis of the aza analogs of tacrine based upon the chemistry of the anionically activated trifluoromethyl group. We identify four sites (A-D) which can be successfully altered to afford the desired fused tricyclic heterocycles in high yield (63-82%). The reaction is believed to proceed through the formation of a quinone methide intermediate. (C) 1999 Elsevier Science Ltd. All rights reserved.