Potassium Fluoride → HCID 69872126, compound

HRID 398122Notes

Reaction equation

HRID 398122 reaction equation
[CH2:1]([O:3][C:4](=[O:31])[C:5]([O:8][C:9]1[CH:14]=[CH:13][C:12]([O:15][CH2:16][CH2:17][C:18]2[N:19]=[C:20]([C:24]3[CH:29]=[CH:28][C:27](Br)=[CH:26][CH:25]=3)[O:21][C:22]=2[CH3:23])=[CH:11][CH:10]=1)([CH3:7])[CH3:6])[CH3:2].[CH3:32][C:33]1[CH:38]=[CH:37][CH:36]=[CH:35][C:34]=1B(O)O.[F-].[K+].C1(P(C2CCCCC2)C2C=CC=CC=2C2C=CC=CC=2)CCCCC1>C([O-])(=O)C.[Pd+2].C([O-])(=O)C.C1COCC1>[CH2:1]([O:3][C:4](=[O:31])[C:5]([CH3:7])([O:8][C:9]1[CH:14]=[CH:13][C:12]([O:15][CH2:16][CH2:17][C:18]2[N:19]=[C:20]([C:24]3[CH:29]=[CH:28][C:27]([C:34]4[CH:35]=[CH:36][CH:37]=[CH:38][C:33]=4[CH3:32])=[CH:26][CH:25]=3)[O:21][C:22]=2[CH3:23])=[CH:11][CH:10]=1)[CH3:6])[CH3:2]

Participants

7

Reactant 4

HCID 522689Potassium FluorideHCID 27332672-Methylphenyl boronic acidHCID 27342162-(Dicyclohexylphosphino)biphenylHCID 110273422-(4-{2-[2-(4-Bromophenyl)-5-methyloxazol-4-yl]ethoxy}phenoxy)-2-methylpropionic acid ethyl ester

Product 1

HCID 69872126HCID 69872126, compound

Reagents, catalysts & solvents 2

HCID 167845palladium(II) acetateCatalystHCID 8028TetrahydrofuranSolvent

Procedure

A solution of 2-(4-{2-[2-(4-bromophenyl)-5-methyloxazol-4-yl]ethoxy}phenoxy)-2-methylpropionic acid ethyl ester (300 mg, 0.614 mmol) (see Ex. 2, part B), 2-methylphenylboronic acid (0.921 mmol), potassium fluoride (88.6 mg, 1.84 mmol), palladium acetate (1.3 mg, 0.14 mol), and 2-(dicyclohexylphosphino)biphenyl (4.3 mg, 12.3 μmol) were combined under N2, to which anhydrous THF (1.23 mL) was added. The yellow mixture was heated at reflux for 12 h. After cooling to room temperature, the mixture was partitioned between Et2O (20 mL) and 1M NaOH (10 mL). The layers were separated, and the aqueous phase was back-extracted with Et2O (10 mL). Combined organic phases were dried over Na2SO4, and concentrated. The product was purified by silica gel chromatography (25 g SiO2, 1:4 ethyl acetate:hexanes) to yield the desired product as an oil. Rf=0.44 in 1:4 ethyl acetate:hexanes; 1H NMR (400 MHz, CDCl3) δ7.99 (d, J=8.6 Hz, 2H), 7.36 (d, J=8.6 Hz, 2H), 7.26-7.21 (m, 4H), 6.81-6.74 (m, 4H), 4.20 (t, J=6.6 Hz, 2H), 4.19 (q, J=7.2 Hz, 2H), 2.94 (t, J=6.6 Hz, 2H), 2.35 (s, 3H), 2.26 (s, 3H), 1.50 (s, 6H), 1.25 (t, J=7.2 Hz, 3H); MS (EI) 500.2 (M+H)+.

Workup

  1. additionwas added
  2. temperatureThe yellow mixture was heated
  3. temperatureat reflux for 12 h
  4. customthe mixture was partitioned between Et2O (20 mL) and 1M NaOH (10 mL)
  5. customThe layers were separated
  6. extractionthe aqueous phase was back-extracted with Et2O (10 mL)
  7. dry with materialCombined organic phases were dried over Na2SO4
  8. concentrationconcentrated
  9. customThe product was purified by silica gel chromatography (25 g SiO2, 1:4 ethyl acetate:hexanes)

Sources & evidence

ORD record
ord-77b26bf6fc6e47ad9410d5db41717bba
Source dataset
uspto-grants-2003_08
Patent number
US06610696B2

Reaction notes

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