The allyl group for protection in carbohydrate chemistry. Part 21. (±)-1,2 : 5.6- and (±)-1,2 : 3,4-di-O-isopropylidene-myo-inositol. The unusual behaviour of crystals of (±)-3,4-di-O-acetyl-1,2,5,6-tetra-O-benzyl-myo-inositol on heating and cooling: a ‘thermosalient solid’
作者:Jill Gigg、Roy Gigg、Sheila Payne、Robert Conant.
DOI:10.1039/p19870002411
日期:——
isomers allowed the separation of all three allyl ethers by column chromatography and these were converted into the corresponding di-O-allyl-myo-inositols. 1,4-Di-O-allyl-myo-inositol was converted into 1,4-di-O-allyl-5,6-O-isopropylidene-myo-inositol on kinetic acetonation. Removal of the allyl groups from 5,6-di-O-allyl-1,2 : 3,4-di-O-isopropylidene-myo-inositol gave pure 1,2 : 3,4-di-O-isopropylidene-myoinositol
外消旋1,2- ø异亚丙基肌醇肌醇被转化为1,2的混合物:3,4-,和1,2-::1,2 5,6-,4,5-二- ö异亚丙基-肌醇-inositols其通过GLC 1,2-解决:4,5-和1,2:5,6-异构体从混合物中作为苯甲酸酯衍生物分离出来。的混合异构体的烯丙基化允许所有三种烯丙基醚的分离用柱色谱将它们转化成相应的二- ø -allyl-肌醇-inositols。1,4-二- ö -allyl-肌醇肌醇被转化为1,4-二- ø -烯丙基-5,6- ö异亚丙基肌醇-肌醇在动力学上的丙酮化作用。从5,6-二-O-烯丙基-1:2,3,4-二-O-异亚丙基-肌醇中除去烯丙基,得到纯的1,2:3,4-二-O-异亚丙基-肌醇。肌醇这给了已知的1,2,3,4-四- ö苄基肌-肌醇。1,2,5,6四-O-苄基-肌醇的二乙酸盐晶体在加热和冷却时表现出有趣的“跳跃”行为。