Naturalp-Menthene Monoterpenes: Synthesis of the Enantiomeric Forms of Wine Lactone, Epi-wine Lactone, Dill Ether, and Epi-dill Ether Starting from a Common Intermediate
作者:Stefano Serra、Claudio Fuganti
DOI:10.1002/hlca.200490189
日期:2004.8
A concise synthesis of the enantiomeric forms of wine lactone (5), epi-wine lactone (14), dill ether (6), and epi-dill ether (15) was accomplished starting from the enantiomeric forms of p-mentha-1,8(10)-diene-3,9-diol (8) (Scheme 3). The latter compounds were previously prepared in high optical purity by means of lipase-mediated kinetic resolution, and they were the common building blocks for this
从p -mentha-1的对映体形式开始,简明地合成了葡萄酒内酯(5),表酒内酯(14),莳萝醚(6)和表莳萝醚(15)的对映体形式, 8(10)-二烯-3,9-二醇(8)(方案3)。后者化合物以前是通过脂肪酶介导的动力学拆分以高光学纯度制备的,它们是这种发散性合成的常见组成部分。关键步骤是许多化学和非对映选择性反应,其中8被氧化为内酯7(见表1)。),全面研究了7对内酯14和5(见表2)的非对映选择性还原,和烯醇醚16对醚15的还原。这种新的合成方法的有效性使得可以以高收率和几个简单的实验步骤制备标题对-薄荷烷单萜,这是香料工业相当感兴趣的。