申请人:FEELLIFE HEALTH INC.
公开号:US20210300889A1
公开(公告)日:2021-09-30
The present invention discloses a method for preparing an artificially synthetic (R,S)-nicotine salt, comprising: S1, reacting 4-methylamino-1-(3-pyridine)-butanone hydrochloride and an alkaline substance at −5 to 5° C.; S2, concentrating a reactant obtained in step S1, and adding a first refining solvent for refining to obtain 1-methyl-2-(3-pyridine)-2-pyrrolidinol; S3, adding a reducing agent into 1-methyl-2-(3-pyridine)-2-pyrrolidinol, and reacting at 15 to 35° C.; and S4, concentrating a reactant obtained in step S3, adding a second refining solvent for refining, and then adding an acid for reaction, to obtain the artificially synthetic (R,S)-nicotine salt. The present invention innovatively proposes a two-step method to synthesize the (R,S)-nicotine salt, and the prepared (R,S)-nicotine salt does not contain any other harmful tobacco compounds. The method of the present invention is simple in process, high in product, and suitable for large-scale industrial production.