2-Arylchromans were readily prepared from the hetero-Diels−Alder reactions of styrenes with the ortho-quinonemethides (o-QMs) which, in turn, were generated by treating the MOM-protected benzylacetate derivatives with p-TsOH immobilized on silica (PTS-Si) in toluene under mild conditions (0 °C to rt). The corresponding chromans were obtained in moderate to excellent yields (42−97%) and in moderate