2,2-Difluoropropionic acid → 2-(1,1-Difluoroethyl)-5-(4-{4-methyl-5-[2-(trifluoromethyl)phenyl]-4H-1,2,4-triazol-3-yl}bicyclo[2.2.2]oct-1-yl)-1,3,4-oxadiazole

HRID 639750Notes

Reaction equation

HRID 639750 reaction equation
[CH3:1][N:2]1[C:6]([C:7]2[CH:12]=[CH:11][CH:10]=[CH:9][C:8]=2[C:13]([F:16])([F:15])[F:14])=[N:5][N:4]=[C:3]1[C:17]12[CH2:24][CH2:23][C:20]([C:25]([NH:27][NH2:28])=[O:26])([CH2:21][CH2:22]1)[CH2:19][CH2:18]2.[F:29][C:30]([F:35])([CH3:34])[C:31](O)=O>C(Cl)Cl>[F:29][C:30]([C:34]1[O:26][C:25]([C:20]23[CH2:23][CH2:24][C:17]([C:3]4[N:2]([CH3:1])[C:6]([C:7]5[CH:12]=[CH:11][CH:10]=[CH:9][C:8]=5[C:13]([F:15])([F:14])[F:16])=[N:5][N:4]=4)([CH2:18][CH2:19]2)[CH2:22][CH2:21]3)=[N:27][N:28]=1)([F:35])[CH3:31]

Participants

4

Reactant 2

HCID 27828252,2-Difluoropropionic acidHCID 592555674-{4-methyl-5-[2-(trifluoromethyl)phenyl]-4H-1,2,4-triazol-3-yl}bicyclo[2.2.2]octane-1-carbohydrazide

Product 1

HCID 160503652-(1,1-Difluoroethyl)-5-(4-{4-methyl-5-[2-(trifluoromethyl)phenyl]-4H-1,2,4-triazol-3-yl}bicyclo[2.2.2]oct-1-yl)-1,3,4-oxadiazole

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

A mixture of 4-{4-methyl-5-[2-(trifluoromethyl)phenyl]-4H-1,2,4-triazol-3-yl}bicyclo[2.2.2]octane-1-carbohydrazide (4-A) (334 mg, 0.850 mmol) and 2,2-difluoropropionic acid (78 mg, 0.708 mmol) was suspended in methylene chloride, and DMC (1.2 g, 7.08 mmol) was added as solid. The mixture was stirred at room temperature under nitrogen for 48 hours before it was diluted with methylene chloride, washed with water, saturated sodium bicarbonate and brine. The crude product was purified by column chromatography to give 4-B as a white solid. MS (ESI+)=468.3 (M+1); 1H NMR (500 MHz, CDCl3): δ 2.15-2.33 (15H, m), 3.52 (3H, s), 7.61 (1H, m), 7.72 (2H, m), 7.85 (1H, m) ppm. Shh-Light II Assay: IC50: 9.3 μM.

Workup

  1. additionDMC (1.2 g, 7.08 mmol) was added as solid
  2. washwashed with water, saturated sodium bicarbonate and brine
  3. customThe crude product was purified by column chromatography

Sources & evidence

ORD record
ord-1f4f9018ed644562b1d039ad42c7334b
Source dataset
uspto-grants-2010_04
Patent number
US07691887B2

Reaction notes

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