5-(Benzyloxy)-1-methyl-4-oxo-1,4-dihydropyridine-2-carboxylic acid → 3-(benzyloxy)-1-methylpyridin-4(1H)-one

Participants

Reaction Conditions

Reaction Steps

A suspension of 5-benzyloxy-1-methyl-4-oxo-1,4-dihydro-pyridine-2-carboxylic acid (18.2 g, 70.2 mmol) in 100 mL of DMF was stirred at oil bath temperature (130-140° C.) for 1.5 h. The reaction mixture was concentrated in vacuo, and the residual oil was diluted with dichloromethane (10 mL) and ethyl acetate (80 mL). The precipitated solid was collected by suction filtration to give 3-benzyloxy-1-methyl-1H-pyridin-4-one as a yellow powder (14.2 g, 94% yield). MS-ESI (m/z): 215.7 [M+1]+, 91.2.

Provenance & Evidence