反应详情

温度

80 °C

In 100 ml. of ethanol is dissolved a mixture of 5 g. of 6,7-dimethoxy-3,4-dihydro-1(2H)-naphthalenone, 8 g. of 1-benzhydrylpiperazine hydrochloride and 10 g. of 37% aqueous formalin and the solution is allowed to stand at room temperature overnight, after which time it is heated at 80° C. for 7 hours. To the reaction mixture is added 500 ml. of water and, after shaking with 100 ml. of diethyl ether, the water layer is neutralized with sodium hydrogen carbonate and extracted with chloroform. The extract is dried and distilled under reduced pressure. To the oily residue is added methanol, whereupon 5 g. of 2-(4-benzhydryl-1-piperazinylmethyl)-6,7-dimethoxy-3,4-dihydro-1(2H)-naphthalenone is obtained as colorless crystals melting at 142°-144° C.

1. additiona mixture of 5 g
2. additionTo the reaction mixture is added 500 ml
3. extractionextracted with chloroform
4. customThe extract is dried
5. distillationdistilled under reduced pressure
6. additionTo the oily residue is added methanol