Water → HCID 13505933, compound

Participants

Reaction Steps

A mixture of 66.2 g (0.18 mole) of diethyl[1-(2,4-dimethoxy-benzyl)-4-oxo-2,2-azetidine-dicarboxylate] prepared according to the preceding paragraph, 70 ml of dimethyl sulfoxide, 12.7 g (0.22 mole) of sodium chloride and 6.5 ml (0.36 mole) of water is stirred on an oil bath (temperature 170°-180° C. for 6 hours. The reaction mixture is poured into 500 ml of a saturated aqueous sodium chloride solution, extracted five times with 100 ml ethyl acetate each, the organic phase is dried over anhydrous magnesium sulfate, filtered and from the filtrate the ethyl acetate is distilled off. Thus 47.6 g of ethyl-[1-(2,4-dimethoxy-benzyl)-4-oxo-2-azetidine-carboxylate] are obtained. B.p.: 170°-176° C./0.15 Hgmm.

Provenance & Evidence