作者:Shan-Shan Li、Li-Li Zhao、Min Pan、Na Feng、Bao-Qiong Li、Xiang-Zhi Zhang、Jin-Bao Peng、Ai-Jun Ma
DOI:10.1021/acs.orglett.3c03472
日期:2023.12.1
An efficient synthesis of (+)-peniciketal B has been accomplished in 15 steps from the commercially available materials atraric acid, acryloyl chloride, and (+)-homoallylic alcohol. A convergent synthetic approach that is quite concise for constructing either “hemisphere” of (+)-peniciketal B with a common intermediate is employed that relies on a cascade intermolecular FeCl3-mediated “inner sphere”
以市售原料阿彻瑞克酸、丙烯酰氯和(+)-高烯丙醇为原料,经过15步有效合成(+)-青缩酮B。采用一种收敛合成方法,该方法非常简洁,可以使用常见中间体构建 (+)-peniciketal B 的任一“半球”,该方法依赖于级联分子间 FeCl 3介导的“内球”迈克尔型反应/双环化α,β-不饱和酮和取代苯酚构建苯并稠合的2,8-二氧杂双环[3.3.1]壬烷,具有优异的非对映选择性。广泛的底物范围也证明了这种转化的普遍性,这些底物将成为天然产物合成和药物化学的潜在候选者。苯环化[6,6]螺缩酮是通过后期酸催化螺缩酮化安装的。