Tetrahydrofuran → HCID 44478524, compound

HRID 408683Notes

Reaction equation

HRID 408683 reaction equation
C([O:3][C:4]([C:6]1[CH:7]=[N:8][N:9]([C:11]2[NH:15][C:14]3[CH:16]=[CH:17][CH:18]=[C:19]([Cl:20])[C:13]=3[N:12]=2)[CH:10]=1)=[O:5])C.C1COCC1.O[Li].O>O>[Cl:20][C:19]1[C:13]2[N:12]=[C:11]([N:9]3[CH:10]=[C:6]([C:4]([OH:5])=[O:3])[CH:7]=[N:8]3)[NH:15][C:14]=2[CH:16]=[CH:17][CH:18]=1

Participants

5

Reactant 3

HCID 8028TetrahydrofuranHCID 168937Lithium hydroxide, monohydrateHCID 66937073HCID 66937073, compound

Product 1

HCID 44478524HCID 44478524, compoundYield 90%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
23 °C

Procedure

To a mixture of 1-(4-chloro-1H-benzoimidazol-2-yl)-1H-pyrazole-4-carboxylic acid ethyl ester (0.180 g, 0.550 mmol), THF (3 mL), and water (1 mL), was added LiOH.H2O (95.0 mg, 2.20 mmol). The mixture was stirred 18 h at 23° C. The solvent was evaporated, water (3 mL) was added and the mixture acidified with aq. 1M HCl. The resulting white precipitate was filtered and dried to yield the titled compound (0.130 g, 90%). MS (ESI/CI): mass calcd. for C11H7ClN4O2, 262.0; m/z found, 263.0 [M+H]+. 1H NMR (400 MHz, DMSO-d6): 13.64 (s, 1H), 12.97 (s, 1H), 8.90 (s, 1H), 8.30 (s, 1H), 7.48 (d, J=7.4 Hz, 1H), 7.32 (dd, J=7.8, 1.0 Hz, 1H), 7.25 (t, J=7.9 Hz, 1H).

Workup

  1. customThe solvent was evaporated
  2. additionwater (3 mL) was added
  3. filtrationThe resulting white precipitate was filtered
  4. customdried

Sources & evidence

ORD record
ord-a27acbcb30a4418da67cf86b64f29b86
Source dataset
uspto-grants-2014_06
Patent number
US08759345B2

Reaction notes

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