Dihydro-3-(2-methoxyethyl)-2(3H)-furanone → 2H-Pyran-4-carboxylic acid, tetrahydro-, methyl ester

Participants

Reaction Steps

During an experimental period of 36 h a total of 900 g of a solution consisting of 53 wt % of 3-(2'-methoxyethyl)-dihydro-2(3H)furanone and 47 wt % of methanol was evaporated and the vapors were passed over 90 g of aluminum oxide catalyst (diameter 1.5 ram) at a temperature of 250° C. in a tubular reactor. Following condensation of the gaseous effluent, analysis was effected using gas chromatography. The conversion of 3-(2'-methoxyethyl)-dihydro-2(3H)furanone was 53%. 46 mol % of methyl tetrahydropyran-4-carboxylate and 7 mol % of 5-oxaspiro-[2.4 ]heptan-2-one were formed.

Provenance & Evidence