【求助】请问苯环上的氰基如何还原?Preparation of 1-N,N-dimethylaminomethyl-4-aminomethylbenzene: To a solution of 1-N,N-dimethyl aminomethyl-4-carbonitrile benzene (4.8 g, 30 mmol) in THF is added a solution of 1 M borane tetrahydrofu ran complex (90 mL). The mixture is heated at reflux temperature for 16 hours under nitrogen. After cooling to room temperature, a 1M solution of HCl in methanol (100 mL) is added. The reaction mixtur e is heated at reflux for 3 hours. The product, which precipitates, is collected by filtration, washed with diethyl ether, and dried in vacuo to give 5.9 g (83percent yield) of the product as the hyd rochloride salt (Compound (i)): 1H NMR (DMSO-d6) delta 8.65 (br s, 3H), 7.55 (dd, 4H), 4.25 (s, 2H), 3.98 (s, 2H), 2.62 (s, 6H). 产率：83%查看更多
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