Dimethyl Carbonate → HCID 54535260, compound

Participants

Reaction Steps

A mixture of 3-benzyloxy-2-methoxy-6,7,8,9-tetrahydro-5H-benzocyclohepten-5-one (3.2 g), sodium methoxide (2.8 g) and dimethyl carbonate (100 ml) is heated for four hours under reflux in a stream of nitrogen. The reaction mixture is poured into ice-water containing concentrated hydrochloric acid (10 ml), and extracted with ethyl acetate. The organic layer is washed with water, dried and concentrated under reduced pressure to afford 3-benzyloxy-2-methoxy-5-oxo-6,7,8,9-tetrahydro-5H-benzocycloheptene-6-carboxylic acid methyl ester (3.7 g) as a pale yellow oily product.

Provenance & Evidence