Lewis Acid Catalyzed Reaction ofo-[1-(Alkylthio)alkyl]phenols: The Generation and Reaction ofo-Quinonemethides and Applications to Cannabinoid Synthesis
Photocyclization of a Bichromophoric Phenol/Olefin System Substituted at the Methylene Spacer − Zwitterions versus H-Bridged Intermediates in the Excited State Proton Transfer
作者:M. Consuelo Jiménez、Miguel A. Miranda、Rosa Tormos、Salvador Gil
Photolysis of (E)- and (Z)-2-(1-ethyl-3-phenylpropenyl)phenol (1 and 2) under a variety of conditions produces a mixture of dihydrobenzopyrans 3 and 4, dihydrobenzofuran 5, cyclopropanes 6 and 7, and rearranged olefin 8. Acidic treatment of 1 and 2 gives a mixture of the six-membered ring products 3 and 4. Remarkable differences, associated with the nature of the precursor and the reaction conditions