A method for preparing nicotine. (1) The nicotinic acid alkyl ester and N-methylpyrrolidone are subjected to a condensation reaction, and then added with a strong acid to obtain 4-methylamino-1-(3-pyridine)-butanone hydrochloride. (2) The 4-methylamino-1-(3-pyridine)-butanone hydrochloride is reacted with an amino-protecting reagent to obtain an intermediate (4). (3) A chiral alcohol (5) is obtained through an asymmetric reduction. (4) The chiral alcohol (5) is converted into the nicotine through a two-step reaction.
一种制备
烟碱的方法。(1) 将
烟酸烷基酯和
N-甲基吡咯烷酮进行缩合反应,然后加入强酸,得到 4-甲基
氨基-1-(3-
吡啶)-
丁酮盐酸盐。(2) 4-甲基
氨基-1-(3-
吡啶)-
丁酮盐酸盐与
氨基保护试剂反应,得到中间体 (4)。(3) 通过不对称还原得到手性醇 (5)。(4) 通过两步反应将手性醇 (5) 转化为
烟碱。