Cesium carbonate → 2-(4-(5-Ethoxy-6-((4-methoxybenzyl)oxy)pyridin-3-yl)-2-fluorophenyl)acetamide

HRID 1428594Notes

Reaction equation

HRID 1428594 reaction equation
[CH2:1]([O:3][C:4]1[C:5]([O:19][CH2:20][C:21]2[CH:26]=[CH:25][C:24]([O:27][CH3:28])=[CH:23][CH:22]=2)=[N:6][CH:7]=[C:8](B2OC(C)(C)C(C)(C)O2)[CH:9]=1)[CH3:2].Br[C:30]1[CH:35]=[CH:34][C:33]([CH2:36][C:37]([NH2:39])=[O:38])=[C:32]([F:40])[CH:31]=1.C([O-])([O-])=O.[Cs+].[Cs+]>O1CCOCC1.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]>[CH2:1]([O:3][C:4]1[CH:9]=[C:8]([C:30]2[CH:35]=[CH:34][C:33]([CH2:36][C:37]([NH2:39])=[O:38])=[C:32]([F:40])[CH:31]=2)[CH:7]=[N:6][C:5]=1[O:19][CH2:20][C:21]1[CH:22]=[CH:23][C:24]([O:27][CH3:28])=[CH:25][CH:26]=1)[CH3:2]

Participants

7

Reactant 3

HCID 10796Cesium carbonateHCID 66718910HCID 66718910, compoundHCID 904167753-Ethoxy-2-((4-methoxybenzyl)oxy)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine

Product 1

HCID 904162422-(4-(5-Ethoxy-6-((4-methoxybenzyl)oxy)pyridin-3-yl)-2-fluorophenyl)acetamideYield 63.6%

Reagents, catalysts & solvents 3

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 962WaterSolvent2×HCID 312751,4-DioxaneSolvent

Procedure

A solution of 3-ethoxy-2-((4-methoxybenzyl)oxy)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (133 mg, 0.345 mmol), 2-(4-bromo-2-fluorophenyl)acetamide (80 mg, 0.345 mmol), Cs2CO3 (225 mg, 0.690 mmol) and PdCl2(dppf) (25.2 mg, 0.034 mmol) in 1,4-dioxane (9 mL) and H2O (3 mL) was stirred at 110° C. for 15 min. After LCMS analysis showed the starting material had disappeared, the mixture was dissolved in H2O (20 mL) and extracted by EA (50 mL). The organic layer was dried over Na2SO4, filtered and concentrated. The crude material was purified by preparative TLC (PE/EA=3/1) to yield a yellow solid of 2-(4-(5-ethoxy-6-((4-methoxybenzyl)oxy)pyridin-3-yl)-2-fluorophenyl)acetamide (90 mg, 0.219 mmol, 63.6% yield): 1H NMR (400 MHz, CD3OD) 7.93 (d, J=2.0 Hz, 1H), 7.43-7.34 (m, 6H), 6.91-6.89 (m, 2H), 5.35 (s, 2H), 4.16-4.11 (m, 2H), 3.78 (s, 3H), 1.41 (t, J=7.0 Hz, 3H); ES-LCMS m/z 291.1 (M−120).

Workup

  1. extractionextracted by EA (50 mL)
  2. dry with materialThe organic layer was dried over Na2SO4
  3. filtrationfiltered
  4. concentrationconcentrated
  5. customThe crude material was purified by preparative TLC (PE/EA=3/1)

Sources & evidence

ORD record
ord-b78f2a7d61b64e0f982b77269beba857
Source dataset
uspto-grants-2015_01
Patent number
US08937071B2

Reaction notes

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