We accidentally found that the F -> OH conversion by direct hydroxylation of electron deficient aryls above 150 degrees C allows the isolation of the precursors of novel quinonemonoimines 9, previously unknown. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis and Properties of the Emerging Azacalix[14]arenes
作者:Mounia Touil、Mourad Elhabiri、Mohammed Lachkar、Olivier Siri
DOI:10.1002/ejoc.201001432
日期:2011.4
We describe the synthesis and spectrophotometric studies of novel N(H)-azacalix[4]arenes. The unprecedented direct functionalization of the N(H) bridges furnished N(R)-bridged aza[1 4] calixarene 11 that could complex a neutral guest (CH 2 Cl 2 ) or could be further reduced into corresponding tetraamino derivative 12.