楼主描述的信息太少，文献描述的都差不多To a Parr reaction bottle was charged 24.2 grams of 3,4-xylidine, 28 grams of diethyl ketone 0.516 grams of dichloroacetic acid (pKa about 1.5) and 1.2 grams of 5percent platinum on carbon. Forty minutes at 70° C. and hydrogen pressure of 44-60 psig were required to consume 100percent of the theoretical amount of hydrogen. A yield of 38.8 g of N-3-pentyl-3,4-xylidine, analyzing 93.9percent pure, was obtained. Thus 36.4 g of product was obtained, corresponding to a yield of 95.4percent. 确实不行建议增大压力和提升反应温度吧，确实不行就分两步反应嘛，先拿到苯胺化合物再进行后续还原胺化
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