Cesium carbonate → N-(2,5-difluorophenyl)-2-(4-(5-ethoxy-6-((4-methoxybenzyl)oxy)pyridin-3-yl)-2-fluorophenyl)acetamide

HRID 576238Notes

Reaction equation

HRID 576238 reaction equation
Br[C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C:9]([NH:11][C:12]2[CH:17]=[C:16]([F:18])[CH:15]=[CH:14][C:13]=2[F:19])=[O:10])=[C:4]([F:20])[CH:3]=1.[CH2:21]([O:23][C:24]1[C:25]([O:39][CH2:40][C:41]2[CH:46]=[CH:45][C:44]([O:47][CH3:48])=[CH:43][CH:42]=2)=[N:26][CH:27]=[C:28](B2OC(C)(C)C(C)(C)O2)[CH:29]=1)[CH3:22].C([O-])([O-])=O.[Cs+].[Cs+]>O1CCOCC1.O.C(Cl)Cl.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]>[F:19][C:13]1[CH:14]=[CH:15][C:16]([F:18])=[CH:17][C:12]=1[NH:11][C:9](=[O:10])[CH2:8][C:5]1[CH:6]=[CH:7][C:2]([C:28]2[CH:27]=[N:26][C:25]([O:39][CH2:40][C:41]3[CH:42]=[CH:43][C:44]([O:47][CH3:48])=[CH:45][CH:46]=3)=[C:24]([O:23][CH2:21][CH3:22])[CH:29]=2)=[CH:3][C:4]=1[F:20]

Participants

8

Reactant 3

HCID 10796Cesium carbonateHCID 904159652-(4-bromo-2-fluorophenyl)-N-(2,5-difluorophenyl)acetamideHCID 904167753-Ethoxy-2-((4-methoxybenzyl)oxy)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine

Product 1

HCID 90416960N-(2,5-difluorophenyl)-2-(4-(5-ethoxy-6-((4-methoxybenzyl)oxy)pyridin-3-yl)-2-fluorophenyl)acetamideYield 46.6%

Reagents, catalysts & solvents 4

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 962WaterSolventHCID 6344DichloromethaneSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
110 °C

Procedure

To a solution of 2-(4-bromo-2-fluorophenyl)-N-(2,5-difluorophenyl)acetamide (40 mg, 0.116 mmol), 3-ethoxy-2-((4-methoxybenzyl)oxy)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (44.8 mg, 0.116 mmol) and Cs2CO3 (114 mg, 0.349 mmol) in 1,4-dioxane (3 mL) and H2O (1 mL) was added PdCl2(dppf) (8.51 mg, 0.012 mmol) in one charge. Then the mixture was stirred at 110° C. in a microwave for 30 min. After LCMS analysis showed the starting material had disappeared, the mixture was filtered. The filtrate was concentrated and evaporated to dryness to give crude product which was dissolved in DCM and washed with H2O and brine. Then the crude product was purified by preparative TLC to give N-(2,5-difluorophenyl)-2-(4-(5-ethoxy-6-((4-methoxybenzyl)oxy)pyridin-3-yl)-2-fluorophenyl)acetamide (45.0 mg, 0.054 mmol, 46.1% yield). 1H NMR: (400 MHz, CD3OD) δ 7.96 (d, J=2.0 Hz, 1H), 7.88 (d, J=9.6 Hz, 1H), 7.46 (d, J=2.0 Hz, 1H), 7.36-7.44 (m, 5H), 7.18 (m, 1H), 6.91 (d, J=8.6 Hz, 2H), 6.87 (br. s., 1H), 5.37 (s, 2H), 4.15-4.13 (m, 2H), 3.88 (s, 2H), 3.79 (s, 3H), 1.43 (t, J=7.0 Hz, 3H); ES-LCMS: m/z 403.0 (M-120+H).

Workup

  1. additioncharge
  2. filtrationthe mixture was filtered
  3. concentrationThe filtrate was concentrated
  4. customevaporated to dryness
  5. customto give crude product which
  6. washwashed with H2O and brine
  7. customThen the crude product was purified by preparative TLC

Sources & evidence

ORD record
ord-7ba6a7cf772b489f80358c16501f9237
Source dataset
uspto-grants-2015_05
Patent number
US09035063B2

Reaction notes

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