Hydrochloric Acid → 1-Methyl-5-(2-pyridin-3-yl-[1,2,4]triazolo[1,5-a]pyridin-6-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid

HRID 1844441Notes

Reaction equation

[CH3:1][N:2]1[C:6]([C:7](=[O:24])[NH:8][C:9]2[CH:10]=[CH:11][C:12]3[N:13]([N:15]=[C:16]([C:18]4[CH:19]=[N:20][CH:21]=[CH:22][CH:23]=4)[N:17]=3)[CH:14]=2)=[C:5]([C:25]([O:27]CC)=[O:26])[CH:4]=[N:3]1.O.[OH-].[Li+].Cl>CO.O>[CH3:1][N:2]1[C:6]([C:7](=[O:24])[NH:8][C:9]2[CH:10]=[CH:11][C:12]3[N:13]([N:15]=[C:16]([C:18]4[CH:19]=[N:20][CH:21]=[CH:22][CH:23]=4)[N:17]=3)[CH:14]=2)=[C:5]([C:25]([OH:27])=[O:26])[CH:4]=[N:3]1

Participants

Conditions

Temperature: 25 °C

Procedure

A mixture of ethyl 1-methyl-5-(2-(pyridin-3-yl)-[1,2,4]triazolo[1,5-a]pyridin-6-ylcarbamoyl)-1H-pyrazole-4-carboxylate (810 mg, 2.07 mmol) and lithium hydroxide hydrate (434 mg, 10.3 mmol) in methanol (30 ml) and water (5 ml) was stirred for 18 hours at 25° C. The mixture was adjusted to pH=7 using hydrochloric acid (2 molar, 5.15 ml) and then evaporated to dryness under reduced pressure. 1-Methyl-5-(2-pyridin-3-yl-[1,2,4]triazolo[1,5-a]pyridin-6-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid (1.38 g) as light brown solid was used without further purification. MS: m/z=364.1 (M+H+).

Workup

customevaporated to dryness under reduced pressure
custom1-Methyl-5-(2-pyridin-3-yl-[1,2,4]triazolo[1,5-a]pyridin-6-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid (1.38 g) as light brown solid was used without further purification

Sources & evidence

ORD record: ord-823cfc0aca384f8a88b0de41279e84c9
Source dataset: uspto-grants-2015_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08946427B2

Reaction notes

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