Potassium Phosphate, Tribasic → 5-[5-(2-Ethyl-3-formylphenyl)-1,3-thiazol-2-yl]-2-[(1-methylethyl)oxy]benzonitrile

HRID 1942644Notes

Reaction equation

HRID 1942644 reaction equation
Br[C:2]1[S:6][C:5]([C:7]2[CH:8]=[CH:9][C:10]([O:15][CH:16]([CH3:18])[CH3:17])=[C:11]([CH:14]=2)[C:12]#[N:13])=[N:4][CH:3]=1.[CH2:19]([C:21]1[C:28](B2OC(C)(C)C(C)(C)O2)=[CH:27][CH:26]=[CH:25][C:22]=1[CH:23]=[O:24])[CH3:20].P([O-])([O-])([O-])=O.[K+].[K+].[K+]>CN(C)C=O.O.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>[CH2:19]([C:21]1[C:22]([CH:23]=[O:24])=[CH:25][CH:26]=[CH:27][C:28]=1[C:2]1[S:6][C:5]([C:7]2[CH:8]=[CH:9][C:10]([O:15][CH:16]([CH3:18])[CH3:17])=[C:11]([CH:14]=2)[C:12]#[N:13])=[N:4][CH:3]=1)[CH3:20]

Participants

7

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 575060295-(5-Bromo-thiazol-2-yl)-2-isopropoxybenzonitrileHCID 584940852-Ethyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzaldehyde

Product 1

HCID 866590075-[5-(2-Ethyl-3-formylphenyl)-1,3-thiazol-2-yl]-2-[(1-methylethyl)oxy]benzonitrileYield 85.9%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
120 °C

Procedure

To a solution of 5-(5-bromo-1,3-thiazol-2-yl)-2-[(1-methylethyl)oxy]benzonitrile (D65) (500 mg), 2-ethyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzaldehyde (443 mg) and tripotassium phosphate (657 mg) in N,N-dimethylformamide (DMF) (12 mL) and water (2 mL) stirred under nitrogen at room temperature was added Pd(Ph3P)4 (179 mg) in one charge. The reaction vessel was sealed and heated under microwave at 120° C. for 15 min. After cooling the reaction, the reaction mixture was filtered and the filtrate was partitioned between ethyl acetate (250 mL) and saturated brine (50 mL). The organic phase was dried over sodium sulphate and evaporated in vacuo. The crude product was purified by column chromatography to give 5-[5-(2-ethyl-3-formylphenyl)-1,3-thiazol-2-yl]-2-[(1-methylethyl)oxy]benzonitrile (D73) (500 mg) as a brown oil. MS (ES): C22H20N2O2S requires 376. found 377.1 (M+H+).

Workup

  1. additioncharge
  2. customThe reaction vessel was sealed
  3. temperatureAfter cooling
  4. customthe reaction
  5. filtrationthe reaction mixture was filtered
  6. customthe filtrate was partitioned between ethyl acetate (250 mL) and saturated brine (50 mL)
  7. dry with materialThe organic phase was dried over sodium sulphate
  8. customevaporated in vacuo
  9. customThe crude product was purified by column chromatography

Sources & evidence

ORD record
ord-74029e0ad7ec4df7bdf543ca05f935a4
Source dataset
uspto-grants-2013_03
Patent number
US08389508B2

Reaction notes

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