33029-18-4Relevant articles and documents
Protecting group free enantiospecific total syntheses of structurally diverse natural products of the tetrahydrocannabinoid family
Dethe, Dattatraya H.,Erande, Rohan D.,Mahapatra, Samarpita,Das, Saikat,Kumar B., Vijay
supporting information, p. 2871 - 2873 (2015/03/03)
A simple, highly diastereoselective, Lewis acid catalyzed Friedel-Crafts coupling of a cyclic allylic alcohol with resorcinol derivatives has been developed. The method was applied for the enantiospecific total syntheses of structurally diverse natural products such as machaeriol-D, Δ8-THC, Δ9-THC, epi-perrottetinene and their analogues. Synthesis of both natural products and their enantiomers has been achieved with high atom economy, in a protecting group free manner and in less than 6 steps, the longest linear sequence, in a very good overall yield starting from R-(+) and S-(-)-limonene.
High-pressure diels-alder cycloadditions between benzylideneacetones and 1,3-Butadienes: Application to the synthesis of (R,R)-(-)- and (S,S)-(+)-Δ8-tetrahydrocannabinol
Ballerini, Eleonora,Minuti, Lucio,Piermatti, Oriana
supporting information; experimental part, p. 4251 - 4260 (2010/09/05)
High-pressure Diels-Alder reactions of various alkoxy/alkyl-substituted benzylideneacetones with methyl-1,3-butadienes are reported. Activation by high pressure (8-11 kbar) in combination with the mild Lewis acid HfCl 42THF allows these reactions to efficiently and regioselectively produce a series of ortho-substituted cyclohexenyl-benzene cycloadducts, that are useful precursors for the expeditious construction of the privileged 6,6-dimethyltetrahydro-6H-benzo[c]chromene skeleton. Application to the synthesis of Δ8-trans-THC in both enantiomeric pure forms is based on the successful resolution of selected cycloadduct by the SAMP-hydrazone method.