New hydrogenated and didehydrogenated 1,2-diamines of quincorine and quincoridine
作者:Ion Neda、Thomas Kaukorat、Christian Hrib
DOI:10.1016/s0957-4166(02)00320-8
日期:2002.7
Four new members of the family of 1,2-diamines of quincorine and quincoridine have been synthesized, being hydrogenated and didehydrogenated at the C10-C11 fragment. The alkynes, containing an additional amino group at C9, are potentially useful building blocks for cross-coupling reactions. Additional investigations concerning the chemical properties of the molecules point to a significant impact of the remote C5 substituent on the basicity of the bridgehead nitrogen. (C) 2002 Elsevier Science Ltd. All rights reserved.