Triethylamine → Methyl cis-1-(2,4-dimethoxybenzyl)-3-(4,5-diphenyl-2-oxo-4-oxazolin-3-yl)-4-oxoazetidine-2-carboxylate

Participants

Reaction Steps

Methyl N-(2,4-dimethoxybenzyl)iminoacetate (1.43 g) is dissolved in 13 ml of dry methylene chloride and 1 ml of triethylamine and cooled in an ice bath. A solution of 4,5-diphenyl-2-oxo-4-oxazolin-3-ylacetic acid chloride (2.0 g, 6.4 mmole) in 10 ml of methylene chloride is added over a 10 minute period. After one hour, the mixture is washed with water and 5% aqueous sodium bicarbonate then dried and evaporated to give a red oil which is chromatographed on silica gel to give methyl cis-1-(2,4-dimethoxybenzyl)-3-(4,5-diphenyl-2-oxo-4-oxazolin-3-yl)-4-oxoazetidine-2-carboxylate.

Provenance & Evidence