One-pot synthesis of imidazolines from aldehydes: detailed study about solvents and substrates
作者:Hiromichi Fujioka、Kenichi Murai、Ozora Kubo、Yusuke Ohba、Yasuyuki Kita
DOI:10.1016/j.tet.2006.11.007
日期:2007.1
Imidazolines were prepared in one-pot operation from aldehydes and diamines through oxidation of aminal intermediates by NBS. This method could be applied to various aromatic and aliphatic aldehydes and N-nonsubstituted and N-monosubstituted 1,2-diamines. Furthermore, it was found that CH2Cl2 could be altered to TBME, a more environmentally friendly solvent, in the reaction using N-nonsubstituted 1,2-diamines. The reaction conditions were very mild and chemoselective. (c) 2006 Published by Elsevier Ltd.