Phosphoric Acid → 2,11-dihydro-3H-s-triazolo[3,4-b][3]benzazepin-3-one

Participants

Reaction Steps

To 3 ml of 80% phosphoric acid was added 0.245 g of 3-methylsulfinyl-11H-s-triazolo[3,4-b][3]benzazepine and the mixture was heated on an oil bath at 130°-140° C. for 1 hour. Following addition of water, the crystals were collected by filtration and dried. By the above procedure was obtained 2,11-dihydro-3H-s-triazolo[3,4-b][3]benzazepin-3-one. Recrystallization from chloroform-methanol yielded colorless needles, m.p. 210°-211° C.

Provenance & Evidence