Potassium Hydroxide → HCID 20135076, compound

Participants

Reaction Steps

To a stirred warm solution of 58.0 g (0.88 mol) of potassium hydroxide (85%) in 500 ml of methanol was added portionwise 81.7 g (0.21 mol) of 1,3,4,5-tetrahydro-3-(methoxycarbonyl)-4-(methoxyphenyl)-6-(trifluoromethyl)-2H-1-benzazepin-2-one - most of the solid dissolved. The mixture was diluted with 100 ml of dioxane and the resulting solution was refluxed for 6 hours. After standing overnight at room temperature, about 50% of the solvent was removed on a rotary evaporator and the residue was diluted with 4 liters of cold water. The insoluble material was filtered and dried (10 g) and the filtrate was cooled and treated portionwise with 270 ml of acetic acid to give a colorless granular solid. The latter was filtered, washed with cold water and dried in a desicator; yield 69.0 g, melting point 179°-181° C. (s. 128° C.).

Provenance & Evidence