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CAS No.: | 1060812-84-1 |
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Name: | 5-Bromopyrazolo[1,5-a]pyridine |
Article Data: | 8 |
Molecular Structure: | |
Formula: | C7H5BrN2 |
Molecular Weight: | 197.034 |
Synonyms: | 5-broMopyrazolo[1,5-a]pyridine;Pyrazolo[1,5-a]pyridine, 5-bromo-;1,3-Benzodioxole-5-carboxaldehyde,8-methoxy-;5-Bromopyrazolo[1,5-a]pyridine(1060812-84-1) |
Density: | 1.69±0.1 g/cm3(Predicted) |
PSA: | 17.30000 |
LogP: | 2.09680 |
ethyl 5-bromopyrazolo[1,5-a]pyridine-3-carboxylate
5-bromopyrazolo[1,5-a]pyridine
Conditions | Yield |
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With sulfuric acid at 100℃; for 4h; | 99.5% |
Stage #1: ethyl 5-bromopyrazolo[1,5-a]pyridine-3-carboxylate With sulfuric acid; water for 18h; Reflux; Stage #2: With sodium hydroxide In water pH=7; | 96% |
With sulfuric acid In water at 110℃; for 16h; | 60% |
5-((tert-butoxycarbonyl)amino)pyrazolo[1,5-a]pyridine-3-carboxylic acid ethyl ester
5-bromopyrazolo[1,5-a]pyridine
Conditions | Yield |
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Multi-step reaction with 3 steps 1.1: dichloromethane / 18 h / 20 °C 2.1: hydrogen bromide; sodium nitrite / water / 0.25 h / 0 °C 2.2: 0.25 h / 50 °C 2.3: pH 5 3.1: sulfuric acid; water / 18 h / Reflux 3.2: pH 7 View Scheme |
5-bromopyrazolo[1,5-a]pyridine
Conditions | Yield |
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Multi-step reaction with 2 steps 1.1: hydrogen bromide; sodium nitrite / water / 0.25 h / 0 °C 1.2: 0.25 h / 50 °C 1.3: pH 5 2.1: sulfuric acid; water / 18 h / Reflux 2.2: pH 7 View Scheme |
N-(4-pyridyl) t-butyl carbamate
5-bromopyrazolo[1,5-a]pyridine
Conditions | Yield |
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Multi-step reaction with 4 steps 1.1: O-(2,4-dinitrophenyl)hydroxylamine / acetonitrile / 18 h / 40 °C 1.2: 18 h / 20 °C 2.1: dichloromethane / 18 h / 20 °C 3.1: hydrogen bromide; sodium nitrite / water / 0.25 h / 0 °C 3.2: 0.25 h / 50 °C 3.3: pH 5 4.1: sulfuric acid; water / 18 h / Reflux 4.2: pH 7 View Scheme |
1-amino-4-bromopyridin-1-ium iodide
5-bromopyrazolo[1,5-a]pyridine
Conditions | Yield |
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Multi-step reaction with 2 steps 1: potassium carbonate / N,N-dimethyl-formamide / 0.17 h 2: sulfuric acid / 80 °C View Scheme | |
Multi-step reaction with 2 steps 1: potassium carbonate / N,N-dimethyl-formamide / 20 °C 2: sulfuric acid / 80 °C View Scheme |
4-bromopyridin
5-bromopyrazolo[1,5-a]pyridine
Conditions | Yield |
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Multi-step reaction with 2 steps 1.1: mesitylenesulfonylhydroxylamine / N,N-dimethyl-formamide / 16 h / 0 - 40 °C 1.2: 6 h / 0 - 20 °C 2.1: sulfuric acid / water / 16 h / 110 °C View Scheme |
5-bromopyrazolo[1,5-a]pyridine
Vilsmeier reagent
5-bromopyrazolo[1,5-a]pyridine-3-carbaldehyde
Conditions | Yield |
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In dichloromethane at 44℃; | 100% |
5-bromopyrazolo[1,5-a]pyridine
5-bromo-3-iodopyrazolo[1,5-a]pyridine
Conditions | Yield |
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With N-iodo-succinimide In methanol at -10 - 20℃; for 18.5h; | 97.5% |
With N-iodo-succinimide In acetonitrile at 20℃; for 16h; | 96% |
With N-iodo-succinimide In acetonitrile at 20℃; for 1h; | 89% |
5-bromopyrazolo[1,5-a]pyridine
N,N-dimethyl-formamide
5-bromopyrazolo[1,5-a]pyridine-3-carbaldehyde
Conditions | Yield |
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Stage #1: 5-bromopyrazolo[1,5-a]pyridine; N,N-dimethyl-formamide With trichlorophosphate at 20℃; for 2h; Vilsmeier formylation; Inert atmosphere; Stage #2: With sodium hydroxide In water pH=10; | 96% |
2-methoxy-4-trifluoromethoxybenzeneboronic acid
5-bromopyrazolo[1,5-a]pyridine
Conditions | Yield |
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With potassium phosphate; bis[tris( 1,1-dimethylethyl)phosphine]-palladium In 1,4-dioxane; water at 80℃; for 16h; | 85% |