vicinal trans-hydroxy groups induced a conformational flip of certain multifunctionalized cyclohexane rings from the usual chair form possessing more equatorial substituents (equatorial-rich chair form) into another chair-form that has more axial substituents (axial-rich chair form). This realization was experimentally revealed by the conformational study of the synthetic myo-inositol derivatives possessing
将相当大的三烷基或二芳基烷基甲
硅烷基基团引入邻位反式羟基导致某些多官能化
环己烷环从具有更多赤道取代基的普通椅子形式(富含赤道的椅子形式)构象翻转为具有更多轴向取代基的另一种椅子形式(富轴向椅子形式)。这样就实现了实验由合成的构象研究揭示肌肉肌醇衍
生物具有2叔丁基二甲基(TBS),三异丙2(
TIPS),或两个叔-butyldiphenylsilyl(T
BDPS)基团在相邻的反式
-二醇。其中,4,5-双-O -
TIPS-的
环己烷环肌肌醇,4,5-双- ö -T
BDPS-肌醇肌醇,和1,2,3,6-四ö苄基-4,5-双- ö -T
BDPS-肌醇肌醇分别在轴向丰富的椅子形式。环构象的比较还显示排斥的顺序为OT
BDPS / OT
BDPS> O
TIPS / O
TIPS> OTBS / OTBS,并且当两个甲
硅烷氧基位于连续的四个赤道取代基的中心时,甲
硅烷氧基/甲
硅烷氧基的斥力增强。 。