Ethylene Glycol → HCID 13689820, compound

Participants

Reaction Steps

25.5 g (0.063 moles) of diethyl-3-acetyl-1-(2,4-dimethoxybenzyl)4-oxo-2,2-azetidine-dicarboxylate prepared according to Example (1e), 6.8 ml (0.126 moles, 7.8 g) of ethylene glycol and 15.8 ml (0.126 moles, 17.9 g) of borotrifluoride diethyl etherate in 100 ml of dry dioxane are allowed to stand at room temperature for 3 days, whereupon 150 ml of water and 150 ml of dichloromethane are added to the reaction mixture. Thereafter the organic phase is separated and shaken with 50 ml of a 5% aqueous sodium hydrogen-carbonate solution and 50 ml of water. The organic phase is separated again, dried with magnesium sulfate, filtered and the filtrate is evaporated. 23.6 g (84% of diethyl-1-(2.4-dimethoxybenzyl)-3-(2-methyl-1,3-dioxolan-2-yl)-4-oxo-2,2-azetidine-dicarboxylate are obtained.

Provenance & Evidence