A simple and general one-pot synthesis of some 2h-pyran-2-ones and fused pyran-2-ones

Article abstract of DOI:10.1016/S0040-4020(01)89774-X

A general one-pot synthesis of some 2H-pyran-2-ones and fused pyran-2-ones starting from 1,3-dlcarbonyl compounds, N-acylglycines and one-carbon synthons (trialkyl orthoformates, diethoxymethyl acetate or N,N-dlmethylformamide dimethyl acetal) in acetic anhydride (or in a mixture of acetic anhydride and acetic acid) is described.