3,4-dihydro-2H-pyran → HCID 59296143, compound

Participants

Reaction Steps

10.0 g 4-Hydroxymethyl-2-(4-methoxy-phenyl)-oxazole-5-carboxylic acid ethyl ester were dissolved in 85 ml dichloromethane. 4.0 ml 3,4-dihydro-2H-pyran and 1.85 mg pyridinium p-toluenesulfonate were added and the reaction mixture stirred at room temperature overnight. The solvent was removed in vacuo and the residue purified by flash chromatography on silica gel (eluting with n-heptane:ethyl acetate=4:1=>1:1) to obtain 12.3 g 2-(4-Methoxy-phenyl)-4-(tetrahydro-pyran-2-yloxymethyl)-oxazole-5-carboxylic acid ethyl ester as an oil.

Provenance & Evidence