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| | 3H-1,2,4-Triazole-3-thione, 5-amino-4-(4-cyclopropyl-1-naphthalenyl)-2,4-dihydro Basic information |
| Product Name: | 3H-1,2,4-Triazole-3-thione, 5-amino-4-(4-cyclopropyl-1-naphthalenyl)-2,4-dihydro | | Synonyms: | 3H-1,2,4-Triazole-3-thione, 5-amino-4-(4-cyclopropyl-1-naphthalenyl)-2,4-dihydro;5-amino-4-(4-cyclopropyl-1-naphthalenyl)-2,4-dihydro-3H-1,2,4-Triazole-3-thione;3-Amino-4-(4-cyclopropylnaphthalen-1-yl)-4H-1,2,4-triazole-5-thiol;3-Amino-4-(4-cyclopropylnaphthalen-1-yl)-1H-1,2,4-triazole-5(4H)-thione;3H-1,2,4-Triazole-3-thione, 5-amino-4-(4-cyclopropyl-1-phthalenyl)-2,4-dihydro;5-amino-4-(4-cyclopropylnaphthalen-1-yl)-2,4-dihydro-3H-1,2,4-triazole-3-thione;3-amino-4-(4-cyclopropylnaphthalen-1-yl)-1H-1,2,4-triazole-5-thione;3-Amino-4-(4-cyclopropyl-1-naphthyl)-1H-1,2,4-triazole-5(4H)-thione | | CAS: | 878671-96-6 | | MF: | C15H14N4S | | MW: | 282.36 | | EINECS: | | | Product Categories: | Drug Intermediates | | Mol File: | 878671-96-6.mol |  |
| | 3H-1,2,4-Triazole-3-thione, 5-amino-4-(4-cyclopropyl-1-naphthalenyl)-2,4-dihydro Chemical Properties |
| Boiling point | 475.2±38.0 °C(Predicted) | | density | 1.52±0.1 g/cm3(Predicted) | | storage temp. | under inert gas (nitrogen or Argon) at 2–8 °C | | pka | 8.22±0.20(Predicted) |
| | 3H-1,2,4-Triazole-3-thione, 5-amino-4-(4-cyclopropyl-1-naphthalenyl)-2,4-dihydro Usage And Synthesis |
| Uses | 5-Amino-4-(4-cyclopropylnaphthalen-1-yl)-4H-1,2,4-triazole-3-thiol is a derivative of 5-Amino-4-(4-cyclopropyl-1-naphthalenyl)-2,4-dihydro-3H-1,2,4-Triazol-3-one (A602165), which is an impurity of the drug Lesinuard (L329700), which is used to synthesize febuxostat, a non-purine analog inhibitor of xanthine oxidase. Febuxostat is approved by the European Medicines Agency and the US Food and Drug Administration for treating gout. | | Synthesis | 1-Cyclopropyl-4-isothiocyanato naphthalene (13.3 mmol, 3.0 g) and aminoguanidine hydrochloride (26.6 mmol, 2.9 g) were mixed in 50 mL of N,N-dimethylformamide. N,N-diisopropylethylamine (39.9 mmol, 5.1 g) was slowly added under stirring conditions. The reaction mixture was stirred at room temperature for 50±12 hrs. After completion of the reaction, the solvent was removed to dryness by rotary evaporator. To the residue, 20 mL of 2 M sodium hydroxide solution was added and the reaction was continued for 50 ± 12 hours. After termination of the reaction, the reaction mixture was filtered and the filtrate was adjusted to pH=4 with dilute hydrochloric acid, at which time a large amount of white precipitate was observed to be generated. The precipitate was collected, washed with deionized water and subsequently dried under vacuum at 45-50 °C to afford the intermediate compound 5-amino-4-(4-cyclopropyl-1-naphthalene)-2,4-dihydro-3H-1,2,4-triazole-3-thiol (VI) in 2.85 g yield and 76% yield. | | References | [1] Patent: CN105566237, 2016, A. Location in patent: Paragraph 0066; 0067; 0068
[2] Patent: WO2009/70740, 2009, A2. Location in patent: Page/Page column 89-90
[3] Patent: WO2006/26356, 2006, A2. Location in patent: Page/Page column 21
[4] Patent: WO2011/85009, 2011, A2. Location in patent: Page/Page column 37 |
| | 3H-1,2,4-Triazole-3-thione, 5-amino-4-(4-cyclopropyl-1-naphthalenyl)-2,4-dihydro Preparation Products And Raw materials |
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