A Convenient One-Pot Synthesis of 2,2-Dialkyl-2,3-dihydro-1H-naphtho[2,1-b]pyrans

This work describes a convenient one-pot procedure for the synthesis of 2,2-disubstituted 2,3-dihydro-1 H-naphtho[2,1- B]pyrans {i.e. 2,2-disubstituted 1 H-benzo[ F]chromans} by the reaction of 2-tetralones and α,α-disubstituted β-hydroxy propionaldehydes under acidic conditions.