Diisopropylethylamine → 1-methyl-N4-(oxetan-3-yl)-N5-(2-phenyl-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-pyrazole-4,5-dicarboxamide

HRID 1802166Notes

Reaction equation

HRID 1802166 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]([C:18]4[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=4)[N:17]=[C:11]3[CH:10]=2)=[C:5]([C:25](O)=[O:26])[CH:4]=[N:3]1.Cl.[O:29]1[CH2:32][CH:31]([NH2:33])[CH2:30]1.C(N(C(C)C)CC)(C)C.CCCP(=O)=O>O1CCCC1>[CH3:1][N:2]1[C:6]([C:7]([NH:8][C:9]2[CH:14]=[CH:13][N:12]3[N:15]=[C:16]([C:18]4[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=4)[N:17]=[C:11]3[CH:10]=2)=[O:24])=[C:5]([C:25]([NH:33][CH:31]2[CH2:32][O:29][CH2:30]2)=[O:26])[CH:4]=[N:3]1

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 16167369Propylphosphoric anhydrideHCID 23062080Oxetan-3-amine hydrochlorideHCID 573789541-methyl-5-(2-phenyl-[1,2,4]triazolo[1,5-a]pyridin-7-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid

Product 1

HCID 573774141-methyl-N4-(oxetan-3-yl)-N5-(2-phenyl-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-pyrazole-4,5-dicarboxamideYield 38.2%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A mixture of 1-methyl-5-(2-phenyl-[1,2,4]triazolo[1,5-a]pyridin-7-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid (100 mg, 276 μmol), oxetan-3-amine hydrochloride (60.5 mg, 552 μmol), diisopropylethylamine (241 μl, 1.38 mmol) and propylphosphonic anhydride (50% in ethyl acetate, 407 μl, 690 μmol) in tetrahydrofurane (7 ml) is stirred for 20 hours at reflux under nitrogen atmosphere. The solvent is evaporated and to the residue is added sat. aqueous sodium hydrogencarbonate solution. The mixture is stirred for 20 minutes while a white solid precipitates. The solid is collected by filtration, washed with diethylether and dried. The residue (94 mg white solid) is triturated with ethyl acetate, filtered and the filtrate is evaporated affording 1-methyl-N4-(oxetan-3-yl)-N5-(2-phenyl-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-pyrazole-4,5-dicarboxamide (44 mg, 38.2%) as a white solid. mp.: >250° C. MS: m/z=418.3 (M+H+).

Workup

  1. temperatureat reflux under nitrogen atmosphere
  2. customThe solvent is evaporated and to the residue
  3. additionis added sat. aqueous sodium hydrogencarbonate solution
  4. stirringThe mixture is stirred for 20 minutes while a white solid
  5. customprecipitates
  6. filtrationThe solid is collected by filtration
  7. washwashed with diethylether
  8. customdried
  9. customThe residue (94 mg white solid) is triturated with ethyl acetate
  10. filtrationfiltered
  11. customthe filtrate is evaporated

Sources & evidence

ORD record
ord-6d13dc63e6564185aa202c53058aeaa9
Source dataset
uspto-grants-2013_01
Patent number
US08349824B2

Reaction notes

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