1-(cyclohepten-1-yl)-2-[[(1R,2R,5S)-1,8,8-trimethyl-3-oxabicyclo[3.2.1]octan-2-yl]oxy]-4-tri(propan-2-yl)silylbut-3-yn-1-one 、
氨基乙醛缩二甲醇 在
florisil 作用下,
以63%的产率得到(3aR,8aS)-8a-(2,2-dimethoxyethylamino)-2-[[(1R,2R,5S)-1,8,8-trimethyl-3-oxabicyclo[3.2.1]octan-2-yl]oxy]-3-[tri(propan-2-yl)silylmethyl]-3a,4,5,6,7,8-hexahydroazulen-1-one