An Efficient Method for the Vicinal Acylation of Unactivated Olefins Using Keteniminium Salts Derived From Protected Alpha-hydroxyacids Or Alpha-amino-acids
Keteniminium salts derived from O-methylglycolic or N-tosylsarcosine amides cycloadd to olefins to give good yields of the corresponding cyclobutanones which undergo regiospecific Baeyer-Villiger oxidation to form gamma-butyrolactones.
Génicot, C., Gobeaux, B., & Ghosez, L. (1991). An Efficient Method for the Vicinal Acylation of Unactivated Olefins Using Keteniminium Salts Derived From Protected Alpha-hydroxyacids Or Alpha-amino-acids. Tetrahedron Letters, 32(31), 3827-3830. https://doi.org/10.1016/S0040-4039(00)79386-5 (Original work published 1991)