As part of our search for synthetic non-narcotic analgesics, 2-(substituted) aminomethyl-3-benzyl-5, 5-dimethylcyclohexanones (3) were prepared by the Mannich reaction of 5, 5-dimethylcyclohexanones (2) with secondary amine hydrochlorides. In this reaction, 6-(substituted)-aminomethylcyclohexanones (4) were also obtained as by-products. Reduction of 3 gave the corresponding 2-(substituted) aminomethyl-3-benzylcyclohexanols (5 and 6). The configurations of compounds 3, 5 and 6 were determined to be 2, 3-trans, 1, 2-cis-2, 3-trans, and 1, 2-trans-2, 3-trans, respectively, by analysis of the nuclear magnetic resonance spectral data. Among the tested compounds, 2, 3-trans-3-benzyl-and 3-(3-methoxybenzyl)-2-dimethylaminomethyl-5, 5-dimethylcyclohexanones (3a and 3c) were almost as potent as codeine phosphate as regards analgesic activity determined by the phenylquinone writhing method.
作为寻找合成非麻醉性镇痛剂的一部分,通过曼尼希反应,以5,5-二甲基
环己酮(2)与二级胺盐酸盐反应,制备了2-(取代)
氨基甲基-3-苄基-5,5-二甲基
环己酮(3)。在此反应中,也得到了副产物6-(取代)
氨基甲基
环己酮(4)。3的还原产物得到了相应的2-(取代)
氨基甲基-3-苄基
环己醇(5和6)。通过核磁共振光谱数据分析,确定化合物的构型分别为2,3-反式、1,2-顺式-2,3-反式和1,2-反式-2,3-反式。在测试的化合物中,2,3-反式-三苯甲基和3-(3-甲氧基苄基)-2-二
甲基氨基甲基-5,5-二甲基
环己酮(3a和3c)在苯基
喹啉扭体法测定的镇痛活性方面,几乎与
磷酸可待因一样强效。