imidazo[1,2-a]pyridine-6-carboxylic acid synthesis
- Product Name:imidazo[1,2-a]pyridine-6-carboxylic acid
- CAS Number:139022-25-6
- Molecular formula:C8H6N2O2
- Molecular Weight:162.15
3167-49-5
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$8.00/5g
97-97-2
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$24.00/25mL
139022-25-6
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$10.00/250mg
Yield:139022-25-6 80.3 g
Reaction Conditions:
Stage #1: chloroacetaldehyde dimethyl acetalwith hydrogenchloride;water in ethanol at 25 - 85; for 1 h;
Stage #2: 6-aminonicotinic acid in ethanol;water at 85; for 24 h;
Steps:
1 Example 1: Preparation of imidazo[l,2-a]pyridine-6-carboxylic acid (IX):
A mixture of chloroacetaldehyde dimethylacetal (247.3 mL), 1M hydrochloric acid (800 mL) and ethanol (150 mL) was heated to 100 °C and stirred for 1 hour at the same temperature. The reaction mass was then cooled to 25 °C and its pH adjusted to 6.5-7.0 with solid sodium bicarbonate (68 g). 6-Amino nicotinic acid (100 g) was added to the above reaction mass in a portion wise manner at 25-30 °C. The reaction mass was slowly heated to 85 °C and stirred for 24 hours at the same temperature. The reaction mass was cooled to 0 °C and its pH adjusted to ~6 with a saturated solution of sodium bicarbonate. The resulting precipitate was filtered and dried at 40 °C for 4 hours to afford the title compound.Yield: 80.3 g
References:
WO2021/229605,2021,A1 Location in patent:Page/Page column 30
![IMidazo[1,2-a]pyridine-6-carboxylic acid, hydrochloride](/CAS/GIF/1314777-15-5.gif)
1314777-15-5
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139022-25-6
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$10.00/250mg
![IMidazo[1,2-a]pyridine-6-carboxylic acid, ethyl ester](/CAS/GIF/158001-04-8.gif)
158001-04-8
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139022-25-6
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$10.00/250mg
3167-49-5
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2032-35-1
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139022-25-6
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$10.00/250mg
![METHYL IMIDAZO[1,2-A]PYRIDINE-6-CARBOXYLATE](/CAS/GIF/136117-69-6.gif)
136117-69-6
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$32.00/500mg
139022-25-6
163 suppliers
$10.00/250mg