Efficient and systematic syntheses of enantiomerically pure and regiospecifically protected myo-inositols
作者:Karol S. Bruzik、Ming Daw Tsai
DOI:10.1021/ja00042a011
日期:1992.7
Efficient and systematic syntheses of a variety of enantiomerically pure and regiospecifically protected myo-inositols, which can be readily used as precursors for most natural and unnatural derivatives of myo-inositol, have been developed. The key strategies are the use of camphor as a protecting group and a chiral auxiliary and the development of regiospecific control in various steps. The diastereomerically
各种对映体纯的和区域特异性保护的肌醇的有效和系统合成已经开发出来,这些肌醇可以很容易地用作大多数天然和非天然肌醇衍生物的前体。关键策略是使用樟脑作为保护基团和手性助剂,并在各个步骤中进行区域特异性控制。非对映体纯 1 ~-2,3-O(l'R,2'R,4'R-1',7',7'-trimethyl(2.2.1) bicyclohept-2'-ylidene)-myo-inositol (la)通过用D-樟脑二甲基乙缩醛使肌醇缩醛化然后从甲醇中结晶以3 1%的产率获得。在路线 A 中,四醇 1a 与叔丁基二苯基甲硅烷基氯 (TBDPS-C1) 的甲硅烷基化仅提供 1-OTBDPS-4,5,6-三醇 7,其充当关键中间体。其他试剂的进一步保护,彻底或区域特异性,结合选择性脱保护步骤,导致受保护的肌醇在 1-, 5-, 6-, 1,4-, 43-, 5,6-, 1, 4,5-和 1,4,6-位。在路线