Generation and Intramolecular Cycloaddition of<i>o</i>-Quinonemethides in Protic Solvent. An Efficient Synthesis of (−)-<i>trans</i>-Hexahydrocannabinol
作者:Zhan Guo Lu、Naoki Sato、Seiichi Inoue、Kikumasa Sato
DOI:10.1246/cl.1992.1237
日期:1992.7
A very facile and efficientsynthesis of (−)-trans-hexahydrocannabinol was achieved through the intramolecular Diels-Alder reaction of an o-quinonemethide derived from 2-(1-hydroxycitronellyl)olivetol 1,3-bismethoxymethyl ether in methanol.
A one-step highly stereocontrolled synthesis of (–)- and (+)-hexahydrocannabinol and related compounds
作者:Giovanni Casiraghi、Mara Cornia、Giuseppe Casnati、Giovanna Gasparri Fava、Marisa Ferrari Belicchi
DOI:10.1039/c39860000271
日期:——
The title compounds have been prepared in high optical and diastereoisomeric purity by diethylaluminium chloride-assisted condensation of suitable phenols with (R)-(+)- or (S)-(–)-citronellal; the X-ray crystal structure of a hexahydrocannabinol analogue is reported.
Efficient one-pot synthetic approaches for cannabinoid analogues and their application to biologically interesting (−)-hexahydrocannabinol and (+)-hexahydrocannabinol
作者:Yong Rok Lee、Likai Xia
DOI:10.1016/j.tetlet.2008.03.075
日期:2008.5
This Letter reports new and efficient synthetic approaches for biologically interesting cannabinoid analogues. The key strategies involve ethylenediamine diacetate/triethylamine-catalyzed cyclization. As an application of this methodology, one-step synthesis of biologicallyactive natural (−)-hexahydrocannabinol and its unnatural enantiomer (+)-hexahydrocannabinol was carried out.