Multiply labelled d8-geranyl diphosphate (3-methyl-7-2H3-methyl-[1,1,8,8,8]-2H5-2E,6-octadienyl diphosphate) was synthesised from geraniol in 8 steps. Geraniol was converted to [1,1]-2H2-geraniol by a three step oxidation–reduction sequence in 38% yield. Selective epoxidation of [1,1]-2H2-geranyl acetate gave 6,7-epoxy-[1,1]-2H2-geranyl acetate, which, on oxidative cleavage of the epoxide and Wittig elaboration with d6-isopropyl triphenylphosphorane, gave d8-geraniol (14% yield) which was, in turn, converted to the title compound. Copyright © 2005 John Wiley & Sons, Ltd.
通过 8 个步骤从
香叶醇合成了多重标记的 d8-
香叶醇二磷酸酯(3-甲基-7-2H3-甲基-[1,1,8,8,8]-2H5-2E,
6-辛二烯基
二磷酸酯)。通过三步氧化-还原顺序,
香叶醇被转化为[1,1]-2H2-
香叶醇,收率为 38%。选择性环氧化 [1,1]-2H2- 甾烯基
乙酸酯可得到 6,7-epoxy-[1,1]-2H2- 甾烯基
乙酸酯,
环氧化物氧化裂解后与 d6-isopropyl
三苯基膦进行 Wittig 反应,可得到 d8-geraniol(产率 14%),进而转化为标题化合物。Copyright © 2005 John Wiley & Sons, Ltd. All Rights Reserved.