Enantioselective Total Synthesis of (-)-Siphonodictyal B and (+)-8-<i>epi</i>-Siphonodictyal B with Phosphatidylinositol 3-Kinase α (PI3Kα) Inhibitory Activity
carbon skeletons; and (iii) deprotection from multiple O-protective groups on the aromatic ring to complete the project synthesis. Both (–)-siphonodictyal B and (+)-8-epi-siphonodictyal B showed PI3Kα inhibitory activity, with potencies comparable to that of liphagal, a naturally occurring PI3Kα inhibitor. New structure–activity relationships for this class of marine meroterpenoids were also revealed.
具有生物学意义的海洋类萜 (–)-siphonodictyal B 和 (+)-8-epi-siphonodictyal B 以 29–40% 的总产率在最长的 11 步线性序列中有效合成. 合成涉及以下关键步骤:(i)高烯丙基萘烷醇的立体发散氢化以安装存在于萘烷片段中的必需的 C8 立体中心;(ii) 将十氢萘片段与芳香部分偶联以组装所需的碳骨架;(iii) 从芳环上的多个O-保护基团上脱保护以完成项目合成。(-)-siphonodictyal B 和 (+)-8-epi-siphonodictyal B 均显示出 PI3Kα 抑制活性,其效力与 liphagal(一种天然存在的 PI3Kα 抑制剂)相当。
673. The constitution and stereochemistry of drimenol, a novel bicyclic sesquiterpenoid
作者:H. H. Appel、C. J. W. Brooks、K. H. Overton
DOI:10.1039/jr9590003322
日期:——
Appel; Gleisner; Sahli, Scientia (Valparaiso), 1948, vol. 15, # 1, p. 31
作者:Appel、Gleisner、Sahli
DOI:——
日期:——
Biogenetically Inspired Total Synthesis of (+)-Liphagal: A Potent and Selective Phosphoinositide 3-Kinase α (PI3Kα) Inhibitor from the Marine Sponge<i>Aka coralliphaga</i>
natural product, (+)-liphagal, was biomimetically synthesized in 29 % overall yield in a longest linear sequence of 13 steps from commercially available (+)-sclareolide. This synthesis involved the following crucial steps: (i) stereocontrolled hydrogenation of an endo-olefinic decalin to install the C8 stereogenic centre present in the requisite decalin segment; (ii) coupling of the decalin segment
Synthesis of the Sesquiterpenes Albicanol, Drimanol, and Drimanic Acid, and the Marine Sesquiterpene Hydroquinone Deoxyspongiaquinol
作者:Matthias Göhl、Karlheinz Seifert
DOI:10.1002/ejoc.201402873
日期:2014.11
used for the synthesis of the sesquiterpenes (+)-albicanol, (+)-drimanol, and (+)-drimanic acid. Starting from all-trans-farnesol, (+)-albicanol could be prepared in seven steps in an overall yield of 14.9 %. Furthermore, a highly diastereoselective hydrogenation of (+)-albicanol to give (+)-drimanol has been developed. We used the synthesized (+)-drimanic acid to achieve the first synthesis of the marine