Cesium carbonate → 5-(4-methoxyphenyl)-2,2-dimethyl-4-(4-(quinolin-2-ylmethoxy)phenyl)furan-3(2H)-one

HRID 1258263Notes

Reaction equation

HRID 1258263 reaction equation
Br[C:2]1[C:3](=[O:17])[C:4]([CH3:16])([CH3:15])[O:5][C:6]=1[C:7]1[CH:12]=[CH:11][C:10]([O:13][CH3:14])=[CH:9][CH:8]=1.CC1(C)C(C)(C)OB([C:26]2[CH:43]=[CH:42][C:29]([O:30][CH2:31][C:32]3[CH:41]=[CH:40][C:39]4[C:34](=[CH:35][CH:36]=[CH:37][CH:38]=4)[N:33]=3)=[CH:28][CH:27]=2)O1.C([O-])([O-])=O.[Cs+].[Cs+]>C1(C)C=CC=CC=1.O.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[CH3:14][O:13][C:10]1[CH:11]=[CH:12][C:7]([C:6]2[O:5][C:4]([CH3:16])([CH3:15])[C:3](=[O:17])[C:2]=2[C:26]2[CH:27]=[CH:28][C:29]([O:30][CH2:31][C:32]3[CH:41]=[CH:40][C:39]4[C:34](=[CH:35][CH:36]=[CH:37][CH:38]=4)[N:33]=3)=[CH:42][CH:43]=2)=[CH:8][CH:9]=1

Participants

7

Reactant 3

HCID 10796Cesium carbonateHCID 583680032-((4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)methyl)quinolineHCID 593547994-bromo-5-(4-methoxyphenyl)-2,2-dimethylfuran-3(2H)-one

Product 1

HCID 445944685-(4-methoxyphenyl)-2,2-dimethyl-4-(4-(quinolin-2-ylmethoxy)phenyl)furan-3(2H)-oneYield 76%

Reagents, catalysts & solvents 3

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 962WaterSolventHCID 1140TolueneSolvent

Procedure

A mixture of 4-bromo-5-(4-methoxyphenyl)-2,2-dimethylfuran-3(2H)-one (2 g, 0.0067 mol), 2-((4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)methyl)quinoline (2.43 g, 0.0067 mol), and Cs2CO3 (11 g, 0.034 mol) in toluene (25 mL) and water (8 mL) was degassed. Pd(dppf)Cl2 (1.1 g, 0.0013 mol) was then added under an inert atmosphere and the mixture was degassed again. The reaction mixture was refluxed for 3 h, filtered through a pad of Celite®. The filtrate was diluted with EtOAc (100 mL), washed with water (50 mL) and brine (50 mL), dried over Na2SO4, filtered and concentrated in vacuo to obtain the crude product. The crude material was purified via silica gel column chromatography to afford 5-(4-methoxyphenyl)-2,2-dimethyl-4-(4-(quinolin-2-ylmethoxy)phenyl)furan-3(2H)-one (2.3 g, 74%) as solid. 1H NMR (500 MHz, d6-DMSO): δ 8.42 (d, J=7.6 Hz, 1 H), 8.06-7.99 (m, 2 H), 7.95 (t, J=7.2 Hz, 1 H), 7.72 (t, J=7.2 Hz, 1 H), 7.63 (t, J=7.8 Hz, 1 H), 7.56 (d, J=7.2 Hz, 2 H); 7.18 (d, J=7.4 Hz, 2 H), 7.12 (d, J=7.2 Hz, 2 H), 6.89 (d, J=7.2 Hz, 2 H), 5.38 (s, 2 H), 3.79 (s, 3 H). 1.42 (s, 6 H). MS: M+H: m/z=452.1; M+Na: m/z=474.2. HPLC: 96%, Column: Eclipse XDB—C18, 150×4.6 mm, 5 um. Mobile Phase: 0.1% TFA in Water (A), AcN (B), Flow rate: 1.5 ml/min (Gradient)

Workup

  1. customwas degassed
  2. customthe mixture was degassed again
  3. temperatureThe reaction mixture was refluxed for 3 h
  4. filtrationfiltered through a pad of Celite®
  5. additionThe filtrate was diluted with EtOAc (100 mL)
  6. washwashed with water (50 mL) and brine (50 mL)
  7. dry with materialdried over Na2SO4
  8. filtrationfiltered
  9. concentrationconcentrated in vacuo
  10. customto obtain the crude product
  11. customThe crude material was purified via silica gel column chromatography

Sources & evidence

ORD record
ord-ae094bfb51864bbcbb9517cec9a524d3
Source dataset
uspto-grants-2013_06
Patent number
US08466148B2

Reaction notes

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