The present disclosure generally relates to methods of preparing nicotine and resolving R,S nicotine to enrich the (S)(−) enantiomer. The method may comprise combining N-methyl-2-pyrrolidone or a salt thereof with a nicotinate compound in the presence of a solvent and a strong base to form 1-methyl-3-nicotinoyl-2-pyrrolidone or a salt thereof; and reducing the 1-methyl-3-nicotinoyl-2-pyrrolidone or salt thereof in solution with Na
2
S
2
O
4
to produce racemic nicotine or salt thereof. Resolving the racemic nicotine (or other enantiomeric mixture) may comprise combining the nicotine with (−)-O,O′-di-p-toluoyl-L-tartaric acid (L-PTTA).
本公开涉及制备
尼古丁和将R,S
尼古丁分离以富集(S)(−)对映体的方法。该方法可能包括将N-甲基-
2-吡咯烷酮或其盐与
烟酸盐化合物在溶剂和强碱的存在下结合,形成1-甲基-3-烟酰基-
2-吡咯烷酮或其盐;并在溶液中用Na2S2O4还原1-甲基-3-烟酰基-
2-吡咯烷酮或其盐以产生消旋
尼古丁或其盐。分离消旋
尼古丁(或其他对映体混合物)可能包括将
尼古丁与(−)-O,O′-二对
甲苯酰-
L-酒石酸(L-P
TTA)结合。