Phosphorus sulfide (P2S5) → 2-(2-Chloroethyl)-2,3-dihydro-7-methoxy-4-methyl-1,4-benzoxazepine-5(4H)-thione

Participants

Reaction Steps

To a solution of 10.3 g (0.04 mole) of 2-(2-chloroethyl)-2,3-dihydro-7-methoxy-4-methyl-1,4-benzoxazepin-5(4H)-one in 200 ml of chloroform was added a mixture of 5.7 g (0.03 mole) of phosphorus pentasulfide and 5.7 g of potassium sulfide which had been ground together. The reaction mixture was stirred and heated at reflux under nitrogen atmosphere for 5 hr. The mixture was filtered hot and the filtrate concentrated under reduced pressure. The residue, an orange solid, was recrystallized from ethanol to give 7.4 g (65%) of product, m.p. 98°-100° C.

Provenance & Evidence