Ethyl Acetate → 1-methyl-5-(2-pyridin-3-yl-[1,2,4]triazolo[1,5-a]pyridin-6-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid ethyl ester

HRID 588422Notes

Reaction equation

[N:1]1[CH:6]=[CH:5][CH:4]=[C:3]([C:7]2[N:16]=[C:10]3[CH:11]=[CH:12][C:13]([NH2:15])=[CH:14][N:9]3[N:8]=2)[CH:2]=1.[CH2:17]([O:19][C:20]([C:22]1[CH:23]=[N:24][N:25]([CH3:30])[C:26]=1[C:27](O)=[O:28])=[O:21])[CH3:18].CCCP(=O)=O.C(OCC)(=O)C.C(N(CC)C(C)C)(C)C>O1CCCC1>[CH2:17]([O:19][C:20]([C:22]1[CH:23]=[N:24][N:25]([CH3:30])[C:26]=1[C:27](=[O:28])[NH:15][C:13]1[CH:12]=[CH:11][C:10]2[N:9]([N:8]=[C:7]([C:3]3[CH:2]=[N:1][CH:6]=[CH:5][CH:4]=3)[N:16]=2)[CH:14]=1)=[O:21])[CH3:18]

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture of 2-(pyridin-3-yl)-[1,2,4]triazolo[1,5-a]pyridin-6-ylamine (480 mg, 2.27 mmol), 4-(ethoxycarbonyl)-1-methyl-1H-pyrazole-5-carboxylic acid (495 mg, 2.5 mmol), propylphosphonic anhydride in ethyl acetate 50% (3.62 g, 3.35 ml, 5.68 mmol) and N,N-diisopropylethylamine (1.17 g, 1.55 ml, 9.09 mmol) in tetrahydrofuran (10 ml) was stirred for 18 hours at 70° C. The solvent was evaporated under reduced pressure, the residue was triturated with saturated aqueous sodium hydrogencarbonate. The precipitated solid was filtered off, washed with water and dried in vacuo, affording 1-methyl-5-(2-pyridin-3-yl-[1,2,4]triazolo[1,5-a]pyridin-6-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid ethyl ester (825 mg, 93%) as light brown solid. Mp.: 217° C. MS: m/z=392.1 (M+H+).

Workup

customThe solvent was evaporated under reduced pressure
customthe residue was triturated with saturated aqueous sodium hydrogencarbonate
filtrationThe precipitated solid was filtered off
washwashed with water
customdried in vacuo

Sources & evidence

ORD record: ord-f16732f31faf40969a5e6a0867314264
Source dataset: uspto-grants-2016_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09227970B2

Reaction notes

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