申请人:HOECHST CELANESE CORPORATION
公开号:EP0481705A1
公开(公告)日:1992-04-22
Arylalkylamines (as a sulfate salt) e.g. tyramine sulfate, are prepared by reacting substituted or unsubstituted arylalkylketones with a lower alkylnitrite in the presence of hydrogen chloride in a dipolar aprotic solvent, then combining the reaction mixture with water and extracting it with a lower alkyl ester or alcohol to recover an aryl-α-oximinoalkylketone extract. The extract, combined with a supported hydrogenation catalyst (e.g. palladium on carbon) in a nonaqueous reaction medium of a major proportion of a mildly protic carboxylic acid (e.g. acetic acid) and a minor proportion of a srong inorganic acid (e.g. sulfuric acid), which is effective in the presence of the catalyst for secondary alcohol dehydration and active as an absorbant for water produced in the dehydration reaction, is hydrogenated to produce the arylalkylamine sulfate sale.
芳烷基胺(作为硫酸盐),例如硫酸酪胺,是通过在氯化氢存在下,在二极性非 普罗溶剂中,使取代或未取代的芳烷基酮与低级亚硝酸烷基酯反应,然后将反应混 合物与水混合,并用低级烷基酯或醇萃取,以回收芳基-α-氧亚氨基烷基酮萃取物。该萃取物与支撑氢化催化剂(如碳上钯)在非水反应介质中结合,该反应介质主要成分为轻度质子羧酸(如乙酸),次要成分为强无机酸(如硫酸),在催化剂存在下,强无机酸对二次醇脱水有效,对脱水反应中产生的水有吸附作用,氢化反应生成出售的芳基烷基胺硫酸盐。