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

HRID 1425840
Notes
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Reaction equation

HRID 1425840 reaction equation
Br[C:2]1[C:3](=[O:18])[C:4]([CH3:17])([CH3:16])[O:5][C:6]=1[C:7]1[CH:12]=[CH:11][C:10]([N+:13]([O-:15])=[O:14])=[CH:9][CH:8]=1.CC1(C)C(C)(C)OB([C:27]2[CH:44]=[CH:43][C:30]([O:31][CH2:32][C:33]3[CH:42]=[CH:41][C:40]4[C:35](=[CH:36][CH:37]=[CH:38][CH:39]=4)[N:34]=3)=[CH:29][CH:28]=2)O1.C([O-])([O-])=O.[Cs+].[Cs+]>C1(C)C=CC=CC=1.O>[CH3:16][C:4]1([CH3:17])[C:3](=[O:18])[C:2]([C:27]2[CH:28]=[CH:29][C:30]([O:31][CH2:32][C:33]3[CH:42]=[CH:41][C:40]4[C:35](=[CH:36][CH:37]=[CH:38][CH:39]=4)[N:34]=3)=[CH:43][CH:44]=2)=[C:6]([C:7]2[CH:12]=[CH:11][C:10]([N+:13]([O-:15])=[O:14])=[CH:9][CH:8]=2)[O:5]1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 3

HCID 10796Cesium carbonateHCID 583680032-((4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)methyl)quinolineHCID 593547574-bromo-2,2-dimethyl-5-(4-nitrophenyl)furan-3(2H)-one

Product 1

HCID 593548082,2-dimethyl-5-(4-nitrophenyl)-4-(4-(quinolin-2-ylmethoxy)phenyl)furan-3(2H)-oneYield 54%

Reagents, catalysts & solvents 2

HCID 962
Water
Solvent
HCID 1140TolueneSolvent

Procedure

A solution of 4-bromo-2,2-dimethyl-5-(4-nitrophenyl) furan-3(2H)-one (100 mg, 0.32 mmol, 1 eq), 2-((4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)methyl)quinoline (115 mg, 0.32 mmol, 1 eq), and Cs2CO3 (521 mg, 1.6 mmol, 5 eq) in toluene (7 mL) and water (2.5 mL) was degassed. Then Pd (dppf)Cl2 (52 mg, 0.06 mmol, 0.2 eq) was added under an inert atmosphere and the solution was again degassed. The reaction mixture was then refluxed for 3 h, filtered through a pad of Celite®, and the filtrate was diluted with EtOAc (30 mL). The combined organic layers were washed with water (20 mL) and brine (10 mL), dried over Na2SO4, filtered, and concentrated in vacuo to obtain the crude product. The crude material was purified via silica gel column chromatography (10% ethyl acetate in hexanes) to afford 2,2-dimethyl-5-(4-nitrophenyl)-4-(4-(quinolin-2-ylmethoxy)phenyl) furan-3(2H)-one (80 mg, 54%) as a solid. 1H NMR (400 MHz, d6-DMSO): δ 8.42 (d, J=8.5 Hz, 1H), 8.27 (d, J=8.5 Hz, 2H), 8.00 (t, J=7.9 Hz, 2H), 7.82-7.76 (m, 3H), 7.68 (d, J=8.5 Hz, 1H), 7.61 (t, J=7.2 Hz, 1H), 7.18 (d, J=8.7 Hz, 2H), 7.10 (d, J=8.7 Hz, 2H), 5.38 (s, 2H), 1.48 (s, 6H). MS: [M+H]: m/z=467.1. HPLC: 89%, Column: Acquity BEH-C-18, 50×2.1 mm, 1.7 um. Mobile Phase: 0.025% TFA in Water (A), AcN (B), Flow rate: 0.5 ml/min (Gradient).

Workup

  1. customthe solution was again degassed
  2. temperatureThe reaction mixture was then refluxed for 3 h
  3. filtrationfiltered through a pad of Celite®
  4. additionthe filtrate was diluted with EtOAc (30 mL)
  5. washThe combined organic layers were washed with water (20 mL) and brine (10 mL)
  6. dry with materialdried over Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo
  9. customto obtain the crude product
  10. customThe crude material was purified via silica gel column chromatography (10% ethyl acetate in hexanes)

Sources & evidence

ORD record
ord-a861677fb51040488dc10347f8f74670
Source dataset
uspto-grants-2015_01
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08933074B2

Reaction notes

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