A Short and Convenient Chemical Route to Optically Pure 2-Methyl Chromanmethanols. Total Asymmetric Synthesis of β-, γ-, and δ-Tocotrienols
作者:Elias A. Couladouros、Vassilios I. Moutsos、Maria Lampropoulou、James L. Little、John A. Hyatt
DOI:10.1021/jo0705418
日期:2007.8.31
commercially available raw materials, chromanmethanol precursors to the natural β-, γ-, and δ-tocotrienols have been prepared in high yield. Enzymatic resolution afforded chiral chromanmethanols in high enantiomeric excess. Subsequent attachment of the farnesyl side chain was high yielding, thus allowing the preparation of asymmetric β-, γ-, and δ-tocotrienols in one final step wherein simultaneous deprotection
使用廉价的可商购的原料,已经以高收率制备了天然β-,γ-和δ-生育三烯酚的苯甲醇甲醇前体。酶促拆分得到高对映体过量的手性苯并二甲醇。法呢基侧链的后续附接是高产率的,因此允许在最后的步骤中制备不对称的β-,γ-和δ-生育三烯酚,其中同时发生苯酚的脱保护和砜基的去除。该化学方法提供了天然系列β-生育三烯酚的首次合成。