Practical synthesis of all inositol stereoisomers from myo-inositol
作者:Sung-Kee Chung、Yong-Uk Kwon
DOI:10.1016/s0960-894x(99)00348-0
日期:1999.8
Synthesis of six inositol stereoisomers was successfully carried out via conduritol intermediates prepared from myo-inositol. Dihydroxylation and epoxidation followed by ring opening of the conduritol B, C and F derivatives gave epi-, allo-, muco-, neo-, DL-chiro- and scyllo-inositol. The cis-inositol derivative, which may not be prepared by this approach, was synthesized in 5 steps via 2-O-benzoyl-myo-inositol
trans-cyclohexylidene moieties by AlCl3–n-Bu4NI to afford parent alcohols in good yields. (−)-Conduritol F was prepared from L-quebrachitol, an optically active cyclitol from the serum of rubber trees, in five steps by use of the demethylation reaction. The first chiral synthesis of (+)-conduritol B and the total synthesis of cyclophellitol, a novel β-glucosidase inhibitor, are described.
AlCl3–n-Bu4NI 优先于顺式和反式亚环己基部分化学选择性地裂解具有邻羟基的环多醇的甲基醚,从而以良好的产率提供母体醇。(-)-Conduritol F 由 L-quebrachitol(一种来自橡胶树血清的光学活性环醇)通过去甲基化反应分五步制备。描述了 (+)-conduritol B 的首次手性合成和新型 β-葡萄糖苷酶抑制剂 cyclophellitol 的全合成。