2-Aminopyridine → (4-Benzyloxy-pyridin-2-yl)-pyridin-2-yl-amine

HRID 523919Notes

Reaction equation

HRID 523919 reaction equation
[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][N:12]=[C:11](Br)[CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[NH2:16][C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][N:18]=1.C(O[K])(C)(C)C>C1(C)C=CC=CC=1.C(Cl)Cl.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][N:12]=[C:11]([NH:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][N:18]=2)[CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

7

Reactant 3

HCID 104392-AminopyridineHCID 153891994-(Benzyloxy)-2-bromopyridineHCID 178418922HCID 178418922, compound

Product 1

HCID 58545055(4-Benzyloxy-pyridin-2-yl)-pyridin-2-yl-amineYield 73%

Reagents, catalysts & solvents 3

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 1140TolueneSolventHCID 6344DichloromethaneSolvent

Procedure

Compound I (2.325 mg, 8.80 mmol), 2-aminopyridine (911 mg, 9.68 mmol), tBuOK (1.481 g, 13.20 mmol), (±)-BINAP (219 mg, 0.35 mmol) and Pd2(dba)3 (201 mg, 0.22 mmol) were stirred in toluene (35 mL) at 90° C. under Ar(g) for 17 h. The reaction mixture was then diluted with CH2Cl2 (20 mL) and silica was added followed by the removal of the solvent under reduced pressure. The resulting dry loaded material was purified by silica gel column chromatography eluting with hexane/EtOAc (60:40 then 50:50) to furnish II as a yellow oil (1.773 g, 73%).

Workup

  1. additionwas added
  2. customfollowed by the removal of the solvent under reduced pressure
  3. customThe resulting dry
  4. customwas purified by silica gel column chromatography
  5. washeluting with hexane/EtOAc (60:40

Sources & evidence

ORD record
ord-26ba17396cc246e3af65201915259b2b
Source dataset
uspto-grants-2016_05
Patent number
US09340503B2

Reaction notes

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