The Diels-Alder reaction of a 2,2-dimethoxyethyl ester via a cationic intermediate

Article abstract of DOI:10.1016/S0040-4039(00)97916-4

2,2-Dimethoxyethyl acrylate, which is easily prepared by the Mitsunobu reaction, reacts with dienes at -78°C in the presence of a Lewis acid such as titanium(IV) chloride to afford the corresponding Diels-Alder adducts in high yields.