丙酮 、
(5S,6S)-6-{(4R,5S,6S)-5-(4-Methoxy-benzyloxy)-6-[(R)-3-(4-methoxy-benzyloxy)-1-methyl-propyl]-2,2-dimethyl-[1,3]dioxan-4-yl}-5-methyl-hept-1-en-4-one 在
盐酸 、 AD-mix-α 作用下,
生成 [(4S,6R)-6-((1S,2S)-2-{(4R,5S,6S)-5-(4-Methoxy-benzyloxy)-6-[(R)-3-(4-methoxy-benzyloxy)-1-methyl-propyl]-2,2-dimethyl-[1,3]dioxan-4-yl}-1-methyl-propyl)-2,2-dimethyl-[1,3]dioxan-4-yl]-methanol 、
(2R,3S,4S)-1-((R)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-4-{(4R,5S,6S)-5-(4-methoxy-benzyloxy)-6-[(R)-3-(4-methoxy-benzyloxy)-1-methyl-propyl]-2,2-dimethyl-[1,3]dioxan-4-yl}-3-methyl-pentan-2-ol 、 (2R,3S,4S)-1-((S)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-4-{(4R,5S,6S)-5-(4-methoxy-benzyloxy)-6-[(R)-3-(4-methoxy-benzyloxy)-1-methyl-propyl]-2,2-dimethyl-[1,3]dioxan-4-yl}-3-methyl-pentan-2-ol