Efficient and novel one-pot synthesis of polycycles bearing cyclols by FeCl3-promoted [2 + 2] cycloaddition: application to cannabicyclol, cannabicyclovarin, and ranhuadujuanine A
摘要:
利用 FeCl3 促进的 [2 + 2] 环加成反应,从容易获得的具有多种取代基的苯并吡喃中开发出简单易行的合成路线,用于制备具有生物学意义的环醇多环。作为该方法的例子,大麻二环醇、大麻二环素和ranhuadujuanine A 的一步合成以良好的产率完成。
Efficient and novel one-pot synthesis of polycycles bearing cyclols by FeCl3-promoted [2 + 2] cycloaddition: application to cannabicyclol, cannabicyclovarin, and ranhuadujuanine A
摘要:
利用 FeCl3 促进的 [2 + 2] 环加成反应,从容易获得的具有多种取代基的苯并吡喃中开发出简单易行的合成路线,用于制备具有生物学意义的环醇多环。作为该方法的例子,大麻二环醇、大麻二环素和ranhuadujuanine A 的一步合成以良好的产率完成。
coupled, in an aromatization-driven single operational step, the condensation of citral and alkylresorciniols to homoprenylchromenes and their in situ deconstructive annulation to benzo[c]chromenes. This process was applied to a total synthesis of cannabinol (CBN, 5) and to its molecular editing.
大麻素(CBC,3)的热降解主要受阳离子反应的影响,而不是模型化合物中观察到的周环重排。这些差异的合理化激发了工艺的发展,该工艺在芳构化驱动的单个操作步骤中将柠檬醛和烷基间苯二酚缩合为高异戊二烯基色烯,并将它们原位解构性环化为苯并[ c ]色烯。此过程应用于大麻酚(CBN,5)的全合成及其分子编辑。
Total Syntheses of Cannabicyclol, Clusiacyclol A and B, Iso-Eriobrucinol A and B, and Eriobrucinol
作者:Hyun-Suk Yeom、Hui Li、Yu Tang、Richard P. Hsung
DOI:10.1021/ol401335u
日期:2013.6.21
Total syntheses of a series of chromane natural products that contain a cyclobutane ring are described. A unified theme In the strategy employed for all these syntheses Is an oxa-[3 + 3] annulation for constructing the chromane nucleus and a stepwise cationic [2 + 2] cycloaddition for the cyclobutane formation. More Importantly, the two reactions could be rendered in tandem, thereby providing an expeditious approach to this family of natural products.
Efficient and novel one-pot synthesis of polycycles bearing cyclols by FeCl3-promoted [2 + 2] cycloaddition: application to cannabicyclol, cannabicyclovarin, and ranhuadujuanine A
作者:Xin Li、Yong Rok Lee
DOI:10.1039/c3ob42110d
日期:——
Simple and facile synthetic routes for the preparation of biologically interesting cyclol bearing polycycles were developed using FeCl3-promoted [2 + 2] cycloaddition from readily available benzopyrans possessing a variety of substituents. As examples of this methodology, one-step syntheses of cannabicyclol, cannabicyclovarin, and ranhuadujuanine A were accomplished in good yield.
利用 FeCl3 促进的 [2 + 2] 环加成反应,从容易获得的具有多种取代基的苯并吡喃中开发出简单易行的合成路线,用于制备具有生物学意义的环醇多环。作为该方法的例子,大麻二环醇、大麻二环素和ranhuadujuanine A 的一步合成以良好的产率完成。