Lithium hydroxide, monohydrate → 1-methyl-5-(2-morpholino-[1,2,4]triazolo[1,5-a]pyridin-7-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid

HRID 1802178Notes

Reaction equation

[CH3:1][N:2]1[C:6]([C:7](=[O:24])[NH:8][C:9]2[CH:14]=[CH:13][N:12]3[N:15]=[C:16]([N:18]4[CH2:23][CH2:22][O:21][CH2:20][CH2:19]4)[N:17]=[C:11]3[CH:10]=2)=[C:5]([C:25]([O:27]CC)=[O:26])[CH:4]=[N:3]1.O.[OH-].[Li+]>CO.O>[CH3:1][N:2]1[C:6]([C:7](=[O:24])[NH:8][C:9]2[CH:14]=[CH:13][N:12]3[N:15]=[C:16]([N:18]4[CH2:19][CH2:20][O:21][CH2:22][CH2:23]4)[N:17]=[C:11]3[CH:10]=2)=[C:5]([C:25]([OH:27])=[O:26])[CH:4]=[N:3]1

Participants

Conditions

Temperature: 50 °C

Procedure

A mixture of ethyl 1-methyl-5-(2-morpholino-[1,2,4]triazolo[1,5-a]pyridin-7-ylcarbamoyl)-1H-pyrazole-4-carboxylate (1.22 g, 3.05 mmol) and lithium hydroxide monohydrate (641 mg, 15.3 mmol) in methanol (30 ml) and water (5 ml) is stirred for 6 hours at 50° C. The solvent is evaporated, the residue diluted with water, acidified to pH=0 with 2N aqueous hydrochloric acid. The precipitated solid is collected by filtration, washed with ethyl acetate and dried affording 1-methyl-5-(2-morpholin-4-yl-[1,2,4]triazolo[1,5-a]pyridin-7-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid (851 mg, 75%) as a light yellow solid. MS: m/z=369.9 (M−H+).

Workup

customThe solvent is evaporated
additionthe residue diluted with water
filtrationThe precipitated solid is collected by filtration
washwashed with ethyl acetate
customdried

Sources & evidence

ORD record: ord-0a1e28de941342a2b7af5e3571aae3bb
Source dataset: uspto-grants-2013_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08349824B2

Reaction notes

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