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

HRID 1428621Notes

Reaction equation

HRID 1428621 reaction equation
Br[C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C:9]([NH:11][C:12]2[CH:17]=[CH:16][C:15]([Cl:18])=[C:14]([Cl:19])[CH:13]=2)=[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]>[Cl:19][C:14]1[CH:13]=[C:12]([NH:11][C:9](=[O:10])[CH2:8][C:5]2[CH:6]=[CH:7][C:2]([C:28]3[CH:27]=[N:26][C:25]([O:39][CH2:40][C:41]4[CH:42]=[CH:43][C:44]([O:47][CH3:48])=[CH:45][CH:46]=4)=[C:24]([O:23][CH2:21][CH3:22])[CH:29]=3)=[CH:3][C:4]=2[F:20])[CH:17]=[CH:16][C:15]=1[Cl:18]

Participants

8

Reactant 3

HCID 10796Cesium carbonateHCID 904167753-Ethoxy-2-((4-methoxybenzyl)oxy)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridineHCID 904170062-(4-bromo-2-fluorophenyl)-N-(3,4-dichlorophenyl)acetamide

Product 1

HCID 90415929N-(3,4-dichlorophenyl)-2-(4-(5-ethoxy-6-((4-methoxybenzyl)oxy)pyridin-3-yl)-2-fluorophenyl)acetamideYield 52.8%

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
130 °C

Procedure

To a solution of 2-(4-bromo-2-fluorophenyl)-N-(3,4-dichlorophenyl)acetamide (60 mg, 0.159 mmol), 3-ethoxy-2-((4-methoxybenzyl)oxy)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (61.3 mg, 0.159 mmol) and Cs2CO3 (156 mg, 0.477 mmol) in 1,4-dioxane (3 mL) and H2O (1 mL) was added PdCl2(dppf) (11.64 mg, 0.016 mmol) in one charge. The mixture was stirred at 130° C. in the 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 (DCM/MeOH=40/1) to give pure product N-(3,4-dichlorophenyl)-2-(4-(5-ethoxy-6-((4-methoxybenzyl)oxy)pyridin-3-yl)-2-fluorophenyl)acetamide (60.0 mg, 0.084 mmol, 52.7% yield): 1H NMR: (400 MHz, CD3OD) δ 7.95 (d, J=2.0 Hz, 1H), 7.92 (d, J=1.8 Hz, 1H), 7.45 (s, 3H), 7.43-7.37 (m, 5H), 6.91 (d, J=8.6 Hz, 2H), 5.37 (s, 2H), 4.15 (m, 3H), 3.79 (s, 4H), 1.42 (t, J=7.0 Hz, 3H); ES-LCMS: m/z 435 (M−120).

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 (DCM/MeOH=40/1)

Sources & evidence

ORD record
ord-06c251ee7b4d451282cd06cd34e8ff88
Source dataset
uspto-grants-2015_01
Patent number
US08937071B2

Reaction notes

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