(4R)-4-[(2S,3S,5S)-5-[(5R)-2-(2,2-dimethylhydrazinyl)-5-ethyl-5-[(1S)-1-hydroxypropyl]-3-methyloxolan-2-yl]-3,5-dimethyloxolan-2-yl]hexan-3-one 在
sodium hydrogen sulfate 作用下,
以
二氯甲烷 、
正戊烷 为溶剂,
反应 0.25h,
生成 <1R-<1α,1<2S
*(R
*),3S
*,5S
*>,3β,4α,6β>>-4-<5-(3,4-diethyl-6-methyl-2,7-dioxabicyclo<2.2.1>hept-1-yl)tetrahydro-3,5-dimethyl-2-furanyl>-3-hexanone 、 (R)-4-[(2S,3S,5S)-5-((1R,3S,4R,6S)-3,4-Diethyl-6-methyl-2,7-dioxa-bicyclo[2.2.1]hept-1-yl)-3,5-dimethyl-tetrahydro-furan-2-yl]-hexan-3-one 、
<4R,4(2S,3S,5R),5<(2R,3R,5R),5(1S)>>-4-<5-<5-(1-benzyloxy)propyl-5-ethyl-2-methoxy-3-methyltetrahydrofuran-2-yl>-3,5-dimethyltetrahydrofuran-2-yl>hexan-3-one 、
(R)-4-[(2S,4S,5S,2'R,3'S,5'R)-5'-Ethyl-2'-hydroxy-5'-((S)-1-hydroxy-propyl)-2,4,3'-trimethyl-octahydro-[2,2']bifuranyl-5-yl]-hexan-3-one