2-(Tributylstannyl)-1,3-thiazole → HCID 86680496, compound

HRID 2406481Notes

Reaction equation

HRID 2406481 reaction equation
Br[C:2]1[CH:9]=[CH:8][C:5]([C:6]#[N:7])=[C:4]([C:10]([F:13])([F:12])[F:11])[CH:3]=1.C([Sn](CCCC)(CCCC)[C:19]1[S:20][CH:21]=[CH:22][N:23]=1)CCC>CN(C=O)C.[Pd](Cl)Cl.C1(P(C2C=CC=CC=2)[C-]2C=CC=C2)C=CC=CC=1.[C-]1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=C1.[Fe+2]>[S:20]1[CH:21]=[CH:22][N:23]=[C:19]1[C:2]1[CH:9]=[CH:8][C:5]([C:6]#[N:7])=[C:4]([C:10]([F:13])([F:12])[F:11])[CH:3]=1

Participants

5

Reactant 2

HCID 27632592-(Tributylstannyl)-1,3-thiazoleHCID 223378254-Bromo-2-(trifluoromethyl)benzonitrile

Product 1

HCID 86680496HCID 86680496, compoundYield 84%

Reagents, catalysts & solvents 2

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 6228DimethylformamideSolvent

Procedure

A solution of 4-bromo-2-(trifluoromethyl)benzonitrile (0.5 g, 2 mmol) in DMF (5 mL) was purged with argon and 2-(tributylstannyl)thiazole (1.12 g/0.9 mL, 3 mmol) and 1,1′-bis(diphenylphosphino)ferrocene-palladium(II)dichloride (0.14 g, 0.2 mmol) added. The reaction mixture was purged with argon for 5 min and retained in microwave for 30 min at 100° C. The reaction mixture was diluted with ice cold water (10 mL) and extracted with ethyl acetate (200 mL). The organic solvent was dried over sodium sulfate, filtered and the solvent was evaporated under reduced pressure to obtain crude product. The crude product was purified by silica gel chromatography (100-200 mesh; 8% ethyl acetate in hexane) to give 4-(thiazol-2-yl)-2-(trifluoromethyl)benzonitrile (0.42 g, 84% yield) as pale yellow solid. 1H NMR (400 MHz, DMSO-d6): δ 8.42-8.39 (m, 2H), 8.27 (d, 1H), 8.08 (d, 1H), 8.03 (d, 1H). LC-MS m/z calculated for [M+H]+ 255.01, found 255.0.

Workup

  1. additionadded
  2. customThe reaction mixture was purged with argon for 5 min
  3. additionThe reaction mixture was diluted with ice cold water (10 mL)
  4. extractionextracted with ethyl acetate (200 mL)
  5. dry with materialThe organic solvent was dried over sodium sulfate
  6. filtrationfiltered
  7. customthe solvent was evaporated under reduced pressure
  8. customto obtain crude product
  9. customThe crude product was purified by silica gel chromatography (100-200 mesh; 8% ethyl acetate in hexane)

Sources & evidence

ORD record
ord-e3ff998eb34d4567aa989861f3cae577
Source dataset
uspto-grants-2014_08
Patent number
US08809372B2

Reaction notes

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