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

HRID 1258342Notes

Reaction equation

HRID 1258342 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]([O:13][CH3:14])=[C:9]([Cl:15])[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.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]>[Cl:15][C:9]1[CH:8]=[C:7]([C:6]2[O:5][C:4]([CH3:17])([CH3:16])[C:3](=[O:18])[C:2]=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)[CH:12]=[CH:11][C:10]=1[O:13][CH3:14]

Participants

7

Reactant 3

HCID 10796Cesium carbonateHCID 583680032-((4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)methyl)quinolineHCID 593547584-bromo-5-(3-chloro-4-methoxyphenyl)-2,2-dimethylfuran-3(2H)-one

Product 1

HCID 445943265-(3-chloro-4-methoxyphenyl)-2,2-dimethyl-4-(4-(quinolin-2-ylmethoxy)phenyl)furan-3(2H)-oneYield 24.6%

Reagents, catalysts & solvents 3

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

Procedure

A solution of 4-bromo-5-(3-chloro-4-methoxyphenyl)-2,2-dimethylfuran-3(2H)-one 0.34 g, 1.021 mmol), 2-((4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)methyl)quinoline (0.37 g, 1.021 mmol), and Cs2CO3 (1.67 g, 5.130 mmol) in toluene (6 mL) and water (3 mL) was degassed. Then, Pd(dppf)Cl2 (0.167 g, 0.204 mmol) was added under an inert atmosphere and the solution was again degassed. Then the reaction mixture was refluxed for 1 h, filtered through a pad of Celite® and the filtrate was diluted with EtOAc (20 mL). The combined organic layers were washed with water (5 mL) and brine (5 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-(3-chloro-4-methoxyphenyl)-2,2-dimethyl-4-(4-(quinolin-2-ylmethoxy)phenyl)furan-3(2H)-one (122 mg, 23%) as a solid. 1H NMR (500 MHz, d6-DMSO): δ 8.42 (d, J=8.5 Hz, 1 H), 8.02 (t, J=7.9 Hz, 2 H), 7.79 (t, J=7.4 Hz, 1 H), 7.70 (d, J=8.2 Hz, 1 H), 7.65-7.59 (m, 2H), 7.51 (d, J=8.1 Hz, 1 H), 7.22-7.18 (m, 3 H), 7.12 (d, J=7.5 Hz, 2 H), 5.40 (s, 2 H), 3.91 (s, 3H), 1.46 (s, 6 H). MS: [M+Na]: m/z=508.2, [M+H]: m/z=486.2. HPLC: 96%, 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. temperatureThen the reaction mixture was refluxed for 1 h
  3. filtrationfiltered through a pad of Celite®
  4. additionthe filtrate was diluted with EtOAc (20 mL)
  5. washThe combined organic layers were washed with water (5 mL) and brine (5 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

Sources & evidence

ORD record
ord-ce9df6e8743a41949e421cc66322cc83
Source dataset
uspto-grants-2013_06
Patent number
US08466148B2

Reaction notes

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