Asymmetric aza-Friedel–Crafts reaction of indoles induced by O-pivaloylated d-galactosylamine as the chiral auxiliary
摘要:
The diastereoselective formation of beta-N-glycosidically linked 3-indolyl methanamine derivatives 5 has been achieved with high yield via an aza-Friedel-Crafts reaction. The reaction was performed by using O-pivaloylated galactosylamine 1 as a chiral template and SnCl4 combining TBAI as catalyst in DCM at -50 degrees C. (C) 2012 Elsevier Ltd. All rights reserved.