Synthesis of (E)-N-[methyl-d3]-4-(3-pyridinyl)-3-buten-1-amine, a deuterated analogue of the nicotinic agonist RJR-2403
作者:Peter A. Crooks、Alain Ravard、Gary D. Byrd
DOI:10.1002/(sici)1099-1344(199812)41:12<1165::aid-jlcr162>3.0.co;2-g
日期:1998.12
The synthesis of (E)-N-[methyl-d3]-4-(3-pyridinyl)-3-buten-1-amine ([methyl-d3]RJR 2403; [methyl-d3]metanicotine) is reported. The incorporation of deuterium was performed during the first step of the synthesis via N-methylation of the pyrrolidine nitrogen of racemic nornicotine with [methyl-d3]iodomethane, in the presence of n-BuLi at −70°C to afford racemic [methyl-d3]nicotine in high yield (91%)
报道了 (E)-N-[甲基-d3]-4-(3-吡啶基)-3-丁烯-1-胺([甲基-d3]RJR 2403;[甲基-d3] 间烟碱)的合成。在合成的第一步中,在正丁基锂的存在下,在 -70°C 下,通过外消旋降烟碱的吡咯烷氮与 [甲基-d3] 碘甲烷的 N-甲基化进行氘的掺入,以提供外消旋的 [甲基- d3]尼古丁的产量高(91%)。然后用氯甲酸乙酯裂解吡咯烷环,得到(E)-N-[甲基-d3]-N-乙氧羰基-4-(3-吡啶基)-3-丁烯-1-胺;在该反应中,在真空 (0.5 mm Hg) 下加热中间体 N-[甲基-d3]-N-乙氧基羰基-4-氯-4-(3-吡啶基)丁-1-胺期间发生了 HCl 的消除。合成的最后一步,即去除 N-氨基甲酰基,通过用浓盐酸水溶液进行酸性水解,以 82% 的总收率得到 [甲基-d3] 间烟碱。样品的同位素纯度通过质谱法测定并计算为 97.6 原子 % 的氘。版权所有