Benzene → HCID 14230750, compound

Participants

Reaction Steps

To 200 ml of benzene are added 8.5 g of cis-1-(2,4-dimethoxybenzyl)-3-phthalimido-2-oxoazetidine-4-carboxylic acid methyl ester and 3.1 g of 1,8-diazabicyclo[5,4,0]-7-undecene, and the mixture is heated under reflux for 72 hours. To the reaction mixture, after cooling, is added 100 ml of ethyl acetate, followed by washing with 100 ml and 50 ml of 1N--HCl, and 100 ml of water in this order. To the resulting mixture is added 100 ml of chloroform and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure. To the residue is added 50 ml of ethyl acetate. The resulting insolubles are collected by filtration, and washed with 30 ml of ethyl acetate to yield 6.4 g of crude product, which is recrystallized from 220 ml of ethyl acetate to yield trans-1-(2,4-dimethoxybenzyl)-3-phthalimido-2-oxoazetidine-4-carboxylic acid methyl ester, m.p. 186°-188° C.

Provenance & Evidence