Water → 3-(1-(4-Benzyloxy-benzyl)-1H-pyrazol-4-yl)-pyridin-2-ylamine

HRID 1690969

Reaction equation

HRID 1690969 reaction equation
[NH2:1][C:2]1[C:7](Br)=[CH:6][CH:5]=[CH:4][N:3]=1.[CH2:9]([O:16][C:17]1[CH:41]=[CH:40][C:20]([CH2:21][N:22]2[CH:26]=[C:25]([Sn](CCCC)(CCCC)CCCC)[CH:24]=[N:23]2)=[CH:19][CH:18]=1)[C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1.O.C(OCC)(=O)C>O1CCCC1.[Cu]I.C1(C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)[Pd][P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[CH2:9]([O:16][C:17]1[CH:41]=[CH:40][C:20]([CH2:21][N:22]2[CH:26]=[C:25]([C:7]3[C:2]([NH2:1])=[N:3][CH:4]=[CH:5][CH:6]=3)[CH:24]=[N:23]2)=[CH:19][CH:18]=1)[C:10]1[CH:11]=[CH:12][CH:13]=[CH:14][CH:15]=1

Participants

8

Reactant 4

HCID 962WaterHCID 8857Ethyl AcetateHCID 8177002-Amino-3-bromopyridineHCID 592551261-(4-benzyloxy-benzyl)-4-tributylstannanyl-1H-pyrazole

Product 1

HCID 592551283-(1-(4-Benzyloxy-benzyl)-1H-pyrazol-4-yl)-pyridin-2-ylamineYield 2%

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178419050HCID 178419050, compoundCatalystHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
70 °C

Procedure

To a solution of 2-amino-3-bromopyridine (44.1 mg, 0.26 mmol) in anhydrous tetrahydrofuran (7 mL) were added 1-(4-benzyloxy-benzyl)-4-tributylstannanyl-1H-pyrazole (141 mg, 0.26 mmol) described in Manufacturing Example 31-1-2, copper (I) iodide (19.4 mg, 0.10 mmol) and bis(triphenylphosphine)palladium (II) (35.8 mg, 0.05 mmol) under nitrogen atmosphere, which was stirred for 4 hours at 70° C. Water and ethyl acetate were added to the reaction mixture at room temperature, which was then filtered through a Celite pad, and the filtrate was partitioned into water and ethyl acetate. The organic layer was washed with water and saturated aqueous sodium chloride, and dried over anhydrous magnesium sulfate, and the solvent was evaporated under a reduced pressure. The residue was purified by NH silica gel column chromatography (ethyl acetate:heptane=2:1, then ethyl acetate) to obtain the title compound (1.8 mg, 2%).

Workup

  1. filtrationwhich was then filtered through a Celite pad
  2. customthe filtrate was partitioned into water and ethyl acetate
  3. washThe organic layer was washed with water and saturated aqueous sodium chloride
  4. dry with materialdried over anhydrous magnesium sulfate
  5. customthe solvent was evaporated under a reduced pressure
  6. customThe residue was purified by NH silica gel column chromatography (ethyl acetate

Sources & evidence

ORD record
ord-8002f4c4a3664fde82cb4671af6cbefa
Source dataset
uspto-grants-2012_04
Patent number
US08153662B2

Linked notes

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