反应详情

16 g (56 mmol, 1.0 equivalent) of 4-[(4-dipropylaminobutyl)amino]methylbenzonitrile (2a), 50 ml of ethanol, 11.9 g (139 mmol, 2.5 equivalents) of a formaldehyde aqueous solution (35%), and 12.8 g (278 mmol, 5 equivalents) of formic acid were charged in a 300 ml four-necked flask. The mixture was reacted at 80° C. for one hour. The raw material was then disappeared. The reaction solution was slowly added to a solution prepared by dissolving 40 g of sodium hydroxide in 200 ml of distilled water. The reaction solution was extracted with 200 ml of chloroform. This operation was repeated twice. The chloroform layer was then dried over anhydrous sodium sulfate. The solvent was then concentrated, thereby obtaining 16 g of 4-[(4-dipropylaminobutyl)methylamino]methylbenzonitrile (2b) as a slightly yellow oily substance (yield: 95%). [HPLC: 99% (HPLC measurement conditions A)]

1. customThe mixture was reacted at 80° C. for one hour
2. additionThe reaction solution was slowly added to a solution
3. customprepared
4. extractionThe reaction solution was extracted with 200 ml of chloroform
5. dry with materialThe chloroform layer was then dried over anhydrous sodium sulfate
6. concentrationThe solvent was then concentrated