Alkyl Isobenzofurans from Phthalides; Inter and Intramolecular Diels-Alder Reactions
作者:Sanath K. Meegalla、Russell Rodrigo
DOI:10.1055/s-1989-27438
日期:——
A general procedure for the conversion of phthalides 1 to alkyl isobenzofurans 4 is described and illustrated with nine. examples. Thus, the alkylidene phthalans 3 produced from the phthalides 1 in one step are in acid catalyzed equilibrium with the. alkyl isobenzofurans 4 which are trapped in situ by dienophiles as the inter- and intramolecular Diels-Alder adducts 5-9.