1H-INDAZOLE-3-(N-METHOXY-METHYL)CARBAMIDE synthesis
- Product Name:1H-INDAZOLE-3-(N-METHOXY-METHYL)CARBAMIDE
- CAS Number:351457-12-0
- Molecular formula:C10H11N3O2
- Molecular Weight:205.21
6638-79-5
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$6.00/25g
4498-67-3
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351457-12-0
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Yield: 85%
Reaction Conditions:
Stage #1:N,O-dimethylhydroxylamine*hydrochloride;1H-Indazole-3-carboxylic acid with pyridine in tetrahydrofuran at 20; for 3 h;Cooling with ice;
Stage #2: with pyridine;1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride in tetrahydrofuran at 20;
Steps:
N-Methoxy-N-methyl-1H-indazole-3-carboxamide (6a)
To a solution of 1H-indazole-3-carboxylic acid (5, 4.87 g,30.0 mmol) in THF (250 mL) was added N,O-dimethylhydroxylaminehydrochloride (3.22 g, 33.0 mmol) at room temperature. Thereaction mixture was cooled on an ice-salt bath for 30 min, andpyridine (5.34 mL, 66.0 mmol) was added. The resultant reactionmixture was stirred on the ice-salt bath for 2 h and at room temperaturefor 1 h. Pyridine (5.34 mL, 66.0 mmol) and EDCHCl (11.5 g,60.0 mmol) were added. The reaction mixture was stirred at roomtemperature overnight and concentrated under reduced pressure,and the residue was triturated with H2O (500 mL). The solids werefiltered and washed with H2O (400 mL) to give 6a as a white solid(5.26 g, 85%). 1H NMR (CDCl3) d 3.57 (s, 3H, NCH3), 3.81 (s, 3H,OCH3), 7.24e7.28 (m, 1H, indazolyl-H), 7.39e7.43 (m, 1H, indazolyl-H), 7.55 (d, 1H, J 8.5, indazolyl-H), 8.21 (d, 1H, J 8.0, indazolyl-H),11.24 (br s, 1H, indazolyl-NH). HRMS (ESI-TOF) m/z 206.0927[MH]; calcd. for C10H12N3O2 206.0924 [MH].
References:
Long, Yi;Yu, Mingfeng;Ochnik, Aleksandra M.;Karanjia, Jasmine D.;Basnet, Sunita KC.;Kebede, Alemwork A.;Kou, Lianmeng;Wang, Shudong [European Journal of Medicinal Chemistry,2021,vol. 213,art. no. 113215]
91-56-5
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$5.00/25g
351457-12-0
66 suppliers
$30.00/1 g
4498-67-3
489 suppliers
$6.00/5g
351457-12-0
66 suppliers
$30.00/1 g
62-53-3
679 suppliers
$10.00/1g
351457-12-0
66 suppliers
$30.00/1 g