N,N,N′,N′-tetramethylchloroformamidinium chloride-mediated cyclizations of β-oxo amides: facile and divergent one-pot synthesis of substituted 2H-pyrans, 4H-pyrans and pyridin-2(1H)-ones

Article abstract of DOI:10.1002/adsc.200900310

An efficient and divergent one-pot synthesis of substituted 2H-pyrans, 4H-pyrans and pyridin-2(1H)-ones from β-oxo amides based on the selection of the reaction conditions is reported. Mediated by N,N,N′,N′- tetramethylchloroformamidinium chloride, β-oxo