(2,4-Dimethoxy-benzylamino)-acetic acid → 4-(2,4-Dimethoxy-benzyl)-7-methylsulfanyl-3,4-dihydro-1H-benzo[e][1,4]diazepine-2,5-dione

Participants

Reaction Conditions

Reaction Steps

A suspension of 6-methylsulfanyl-1H-benzo[d][1,3]oxazine-2,4-dione (4.8 g, 23 mmol) containing (2,4-dimethoxy-benzylamino)-acetic acid (5.6 g, 25 mmol) in p-xylene (50 mL) was heated under reflux (150° C.) for 3 h. After cooling to room temperature the precipitate was filtered off and washed with p-xylene (2×20 ml). Yield: 7.5 g (89%). m/z 373 (MH+).

Provenance & Evidence