The complex formed in the reaction mixture is then hydrolyzed with water.ĭuring the hydrolysis, 500 ml of tetrahydrofuran is added to facilitate stirring. The addition takes 80 minutes while maintaining gentle refluxing, and the reaction mixture is then refluxed overnight and allowed to cool to room temperature over a period of 3 days. Mols) of lithium aluminum hydride in 1.2 liters of tetrahydrofuran is added with stirring a solution of 356 g (1.18 mols) of 2cyclopropylcarbonylamido-5-chlorobenzophenone in 1.8 liters of tetrahydrofuran. Preparation of 2-Cyclopropylmethylamino-5-Chlorobenzhydrol: To a slurry of 94.8 g (2.47 The residue is recrystallized from 1,500 ml of methanol, charcoal treating the hot solution to give 356 g of 2 -cyclopropylcarbonylamido5chlorobenzophenone, MP 105° to 105.5☌ (69% yield). The methylene chloride solution is then dried over anhydrous magnesium sulfate, filtered and the solvent removed under vacuum. The solvent is then removed under vacuum to obtain 2-cyclopropylcarbonylamido-5chlorobenzophenone as a residue which is dissolved in 1 liter of methylene chloride, washed twice with 5% hydrochloric acid, and then twice with 10% potassium hydroxide. The reaction is refluxed 2? hours and allowed to cool to room temperature. To 400.5 g (1.73 mols) of 2-amino-5-chlorobenzophenone dissolved in 220 g (2.18 mols) of triethylamine and 3.5 liters of tetrahydrofuran is added cautiously 181 g (1.73 mols) of cyclopropanecarboxylicacid chloride. Manufacturing Process: Preparation of 2-Cyclopropylcarbonylamido-5-Chlorobenzophenone:
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