作者:Xiaoling Jin、Xinping Yang、Li Yang、Zhong-Li Liu、Fa Zhang
DOI:10.1016/j.tet.2004.01.075
日期:2004.3
Isotachysterol, the acid-catalyzed isomerization product of vitamin D-3, produces seven previously unknown oxygenation products in a self-initiated autoxidation reaction under atmospheric oxygen in the dark at ambient temperature. They are (5R)-5,10-epoxy-9,10-secocholesta-6,8(14)-dien-3beta-ol (6a), (5S)-5,10-epoxy-9,10-secocholesta-6,8(14)-dien-3beta-ol (6b), (10R)-9,10-secocholesta-5,7,14-trien-3beta,10-diol (7a), (10S)-9, 10-secocholesta-5,7,14-trien-3beta,10-diol (7b), (7R,10R)-7,10-epoxy-9, 10-secocholesta-5,8(14)-dien-3beta-ol (8), 5,10-epidioxyisotachysterol (9) and 3,10-epoxy-5-oxo-5,10-seco-9, 10-secocholesta-6,8(14)-dien-10-ol (10). The formation of these products is explained in terms of free radical peroxidation chemistry. (C) 2004 Elsevier Ltd. All rights reserved.