反应详情

A mixture containing 10.0 grams of the intermediate 1-(2-aminoethyl)-N-(2-benzoyl-4-chlorophenyl)-hydrazinecarbothioamide (Example 14) and 200 ml of glacial acetic acid was refluxed for 30 minutes with stirring. The acetic acid was removed in vacuo to leave a yellow oil. The residue was dissolved in methylenechloride, washed with separate rinses of 10% sodium hydroxide and water, and dried with magnesium sulfate. The solvent was evaporated to leave the 8-chloro-2,3-dihydro-6-phenyl-11H-imidazo(2,1-b) (1,3,4) benzotriazepine. The product was recrystallized from isopropanol to yield yellow crystals having a melting point of 191.5° to 193.5° C. Infrared analysis was used to confirm the structure.

1. temperaturewas refluxed for 30 minutes
2. customThe acetic acid was removed in vacuo
3. customto leave a yellow oil
4. washwashed with separate rinses of 10% sodium hydroxide and water
5. dry with materialdried with magnesium sulfate
6. customThe solvent was evaporated