Dimethylformamide → HCID 9922555, compound

HRID 431922Notes

Reaction equation

HRID 431922 reaction equation
[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[C:7]1[N:11]=[C:10]([C:12]2[CH:17]=[C:16]([C:18]([O:20][CH3:21])=[O:19])[CH:15]=[C:14](I)[CH:13]=2)[O:9][N:8]=1.[CH3:23][N:24](C)C=O>C(OCC)(=O)C.[C-]#N.[Zn+2].[C-]#N.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[C:7]1[N:11]=[C:10]([C:12]2[CH:17]=[C:16]([C:18]([O:20][CH3:21])=[O:19])[CH:15]=[C:14]([C:23]#[N:24])[CH:13]=2)[O:9][N:8]=1

Participants

6

Reactant 2

HCID 6228DimethylformamideHCID 10201421HCID 10201421, compound

Product 1

HCID 9922555HCID 9922555, compoundYield 78%

Reagents, catalysts & solvents 3

HCID 11186Zinc cyanide (Zn(CN)2)CatalystHCID 178418397HCID 178418397, compoundCatalystHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
80 °C

Procedure

In a similar fashion, a solution of 3-(2-pyridyl)-5-(3-iodo-5-(methoxycarbonyl)phenyl)-1,2,4-oxadiazole (50 mg, 0.122 mmol) in N,N-dimethylformamide (2 mL) was treated with zinc cyanide (22.5 mg, 0.191 mmol), and Pd(PPh3)4 (14 mg, 0.012 mmol). The reaction mixture was heated at 80° C. under an argon atmosphere for 2 hours. The mixture was then diluted with ethyl acetate (25 mL) and washed with water (3×5 mL) and brine (3×5 mL). The organic solution was then dried over anhydrous MgSO4, filtered and concentrated in vacuo. Silica gel chromatography using 30% ethyl acetate in hexane afforded 29.2 mg (78%) of 3-(2-pyridyl)-5-(3-cyano-5-(methoxycarbonyl)phenyl)-1,2,4-oxadiazole: 1H-NMR (CDCl3), δ (ppm): 9.19 (s, 1H), 8.89 (d, 1H), 8.80 (s, 1H), 8.59 (s, 1H), 8.25 (d, 1H), 7.95 (t, 1H), 7.50 (m, 1H), 4.09 (s, 3H).

Workup

  1. washwashed with water (3×5 mL) and brine (3×5 mL)
  2. dry with materialThe organic solution was then dried over anhydrous MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-0ffa5c4ac4404cfcbfa8022680d37840
Source dataset
uspto-grants-2003_12
Patent number
US06660753B2

Reaction notes

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