65351-96-4Relevant academic research and scientific papers
Enantioselective Organocatalytic Synthesis of Bicyclic Resorcinols via an Intramolecular Friedel?Crafts-Type 1,4-Addition: Access to Cannabidiol Analogues
Bryant, Laura A.,Cobb, Alexander J. A.,Johnston, Callum D.,Lees, Nicholas R.,Shankland, Kenneth,Straker, Hannah E.
, p. 4067 - 4074 (2021)
The organocatalytic transformation of resorcinols is extremely rare. In this article, we report a highly enantioselective, organocatalytic intramolecular cyclization of these systems by a Friedel–Crafts-type 1,4-addition using a J?rgensen-Hayashi-like organocatalyst with a large silyl protecting group, and show that heat improves reaction yield with virtually no detriment to enantioselectivity. A variety of bicyclic resorcinols were obtained with excellent enantioselectivities (up to 94%). To show the utility of these constructs, and as part of a wider project involving the synthesis of cannabinoid-like compounds, the resorcinol formed was used to generate both ‘normal’ and ‘abnormal’ cannabidiol (CBD) derivatives which were shown to have anticonvulsant activity. (Figure presented.).
