Synthesis of sulfonyl 2-aryl-5-methylenyltetrahydropyrans

Abstract

In this study, the present research describes a high-yield method for the synthesis of sulfonyl 2-aryl-5-methylenetetrahydropyrans by one-pot straightforward DABCO-promoted intramolecular Michael addition of β-sulfonyl styrene with 2-chloromethyl-1-propenol followed by intramolecular alkylation. This Baylis–Hillman-type pathway provides a highly effective stereoselective annulation by forming one carbon–oxygen bond and one carbon–carbon bond.