Stereoselective synthesis of 3,7-diarylaminocholestanes by titanium-mediated reductive amination
摘要:
An efficient method for the synthesis of aryl aminocholestanes, using a chlorotriisopropoxytitanium (IV)-mediated reductive amination reaction of 5 alpha-cholestane-3,7-dione, is reported. A series of 3, 7-diarylaminocholestane derivatives were prepared according to this methodology in up to 98% yield. These compounds were primarily characterized by H-1 NMR, C-13 NMR, and mass spectrometry. (C) 2014 Elsevier Inc. All rights reserved.