Mirtazapine Impurity 7
1-(3-Carboxypyrid-2-yl)-2-phenyl-4-methyl-piperazine
CAS: 61338-13-4
Molecular Formula: C17H19N3O2
Mirtazapine Impurity 7 - Names and Identifiers
| Name | 1-(3-Carboxypyrid-2-yl)-2-phenyl-4-methyl-piperazine |
| Synonyms | Mirtazapine acid Mirtazapine Impurity 7 Mirtazapine Carboxylic Acid 1-(3-Carboxy-2-pyridyl)-4-methyl-2-phenylpiperazine 1-(3-carboxy-2-pyridyl)-4-methyl-2-phenylpiperazine 1-(3-Carboxypyrid-2-yl)-2-phenyl-4-methyl-piperazine 2-(4-Methyl-2-phenyl-1-piperazinyl)-3-pyridinecarboxylic acid 2-(4-methyl-2-phenylpiperazin-1-yl)pyridine-3-carboxylic acid 2-(4-Methyl-2-phenyl-1-piperazinyl)-3-pyridinecarboxylic acid 3-Pyridinecarboxylic acid, 2-(4-methyl-2-phenyl-1-piperazinyl)- |
| CAS | 61338-13-4 |
| EINECS | 612-130-0 |
| InChI | InChI=1/C17H19N3O2/c1-19-10-11-20(15(12-19)13-6-3-2-4-7-13)16-14(17(21)22)8-5-9-18-16/h2-9,15H,10-12H2,1H3,(H,21,22) |
Mirtazapine Impurity 7 - Physico-chemical Properties
| Molecular Formula | C17H19N3O2 |
| Molar Mass | 297.35 |
| Density | 1.225 |
| Melting Point | 160-161 °C |
| Boling Point | 494.3±45.0 °C(Predicted) |
| Flash Point | 252.756°C |
| Solubility | DMSO (Slightly), Methanol (Slightly) |
| Vapor Presure | 0mmHg at 25°C |
| Appearance | Solid |
| Color | Light Tan |
| pKa | 1.83±0.36(Predicted) |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | 1.61 |
Mirtazapine Impurity 7 - Reference Information
| synthesis | Method 1: The nitrile intermediate is hydrolyzed in alkaline condition and then reduced with lithium aluminum hydride to prepare the intermediate mirtazapine acid: Method 2: 2-chloronicotinamide, 2-halogenated nicotinonitrile as starting compound, 2-(4-methyl -2 phenyl -1-piperazinyl) nicotinamide, 2-(4-methyl -2 phenyl -1-piperazinyl) nicotinic acid, namely mirtazapine acid, the reaction steps are as follows: 1) the 2-halogenated nicotinonitrile, I .e., compound A, is added to the acid or base, and after complete dissolution, the temperature is raised to 90 °c, stirring for 0.5~24 hours, after the end of the reaction, the reaction solution is poured into the mixture of ammonia water and ice, and the filter cake is collected by stirring and filtration to obtain a crude solid product, which is mixed with ethyl acetate and then slurried, stir for 1-4 hours, filter, The filter cake was collected and dried to obtain a white solid compound, namely Intermediate B; 2) Intermediate B, intermediate C and alkali were dissolved in organic solvent and heated to 100~140 ℃, after stirring for 10-30 hours, the reaction solution was carefully added to ice water, stirred for 15-60 minutes, filtered and separated to obtain a white solid, and the white solid was further air-dried at 50 °c to obtain a white solid compound, 3) the intermediate D and the base are added to the mixed solution of ethanol and water, heated to 100-140 ° C, and stirred for 20-30 hours, water was added, the solvent was removed under reduced pressure, hydrochloric acid was added dropwise to pH 7-8, extracted 1-3 times with dichloromethane, and the organic phase was dried over anhydrous sodium sulfate to give a white solid, the white solid was further air-dried at 50 °c to obtain a white solid compound, namely intermediate E; |
Last Update：2024-04-09 02:00:10
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