5746-86-1Relevant articles and documents
Preparation method of nicotine and intermediate thereof
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, (2021/06/02)
The invention relates to a preparation method of nicotine and an intermediate thereof, wherein the intermediate has a structure as shown in a formula (II), X1, X2 and X3 are respectively and independently CR2R3, R1 is a C1-6 alkyl group, and R2 and R3 are each independently H or a C1-6 alkyl group. According to the invention, the preparation method of the nicotine and the intermediate thereof has the advantages of simple operation, mild reaction conditions, easily available raw materials, and high conversion rate, can effectively reduce the production cost of the nicotine, and has the potential of industrial production, and each reaction can be directly post-fed through simple post-treatment basically.
Synthesis method of racemic nicotine
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Paragraph 0047; 0053-0062, (2021/01/04)
The invention discloses a synthesis method of racemic nicotine. The method comprises the following steps: S1, introducing 3-(1-pyrrolin-2-yl) pyridine, a solvent and hydrogen into a first fixed bed reactor filled with a metal catalyst, and cooling at an outlet to obtain a crude product 3-(1-pyrrolidin-2-yl) pyridine mixed solution; and S2, taking the crude product 3-(1-pyrrolidine-2-yl) pyridine and a methylation reagent to pass through a solid second fixed bed reactor filled with a solid base catalyst, and cooling at an outlet to obtain racemic nicotine. The continuous flow fixed bed method is used for preparing racemic nicotine so that the continuity of production is realized, the reaction time is shortened, the reaction operation is simplified, the solvent consumption is reduced, the discharge of waste water and waste liquid is reduced, and the catalyst is convenient to recover.
PREPARATION OF RACEMIC NICOTINE BY REACTION OF ETHYL NICOTINATE WITH N-VINYLPYRROLIDONE IN THE PRESENCE OF AN ALCOHOLATE BASE AND SUBSEQUENT PROCESS STEPS
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Page/Page column 14-16, (2019/07/13)
The present invention relates to a method of preparing racemic nicotine comprising: (i) reacting ethyl nicotinate and N-vinylpyrrolidone in the presence of an alcoholate base to 3-nicotinoyl-1-vinylpyrrolidin-2-one; (ii) reacting the 3-nicotinoyl-1-vinylpyrrolidin-2-one with an acid to myosmine; (iii) reducing the myosmine to nornicotine using a reducing agent; and (iv) methylating the nornicotine to obtain the racemic nicotine.