Lithium Chloride → 3-(6-Fluoro-2-pyridinyl)-5-(3-pyridinyl)-1-[[2-(trimethylsilyl)ethoxy]methyl]-1H-pyrazolo[3,4-c]pyridine

HRID 1775071Notes

Reaction equation

HRID 1775071 reaction equation
I[C:2]1[C:10]2[C:5](=[CH:6][N:7]=[C:8]([C:11]3[CH:12]=[N:13][CH:14]=[CH:15][CH:16]=3)[CH:9]=2)[N:4]([CH2:17][O:18][CH2:19][CH2:20][Si:21]([CH3:24])([CH3:23])[CH3:22])[N:3]=1.[F:25][C:26]1[CH:31]=[CH:30][CH:29]=[C:28]([Sn](CCCC)(CCCC)CCCC)[N:27]=1.[Li+].[Cl-]>CN(C=O)C.[Cu]I.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[F:25][C:26]1[N:27]=[C:28]([C:2]2[C:10]3[C:5](=[CH:6][N:7]=[C:8]([C:11]4[CH:12]=[N:13][CH:14]=[CH:15][CH:16]=4)[CH:9]=3)[N:4]([CH2:17][O:18][CH2:19][CH2:20][Si:21]([CH3:24])([CH3:23])[CH3:22])[N:3]=2)[CH:29]=[CH:30][CH:31]=1

Participants

7

Reactant 3

HCID 433294Lithium ChlorideHCID 164271152-Fluoro-6-(tributylstannyl)pyridineHCID 71253586HCID 71253586, compound

Product 1

HCID 712540573-(6-Fluoro-2-pyridinyl)-5-(3-pyridinyl)-1-[[2-(trimethylsilyl)ethoxy]methyl]-1H-pyrazolo[3,4-c]pyridineYield 80%

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418397HCID 178418397, compoundCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
120 °C

Procedure

To a mixture of 3-iodo-5-(pyridin-3-yl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazolo[3,4-c]pyridine (GCP-P3-205-1) (200 mg, 0.44 mmol) and 2-fluoro-6-(tributylstannyl)pyridine (206 mg, 0.53 mmol) in 3 mL DMF, was added TEA 1 mL, LiCl (56 mg, 1.32 mmol) and CuI (84 mg, 0.44 mmol), and Pd(PPh3)4 (254 mg, 0.22 mmol). The reaction mixture was heated at 120° C. under microwave irradiation for 1 h, and the reaction was monitored by LCMS. Upon completion, the reaction mixture was extracted with 100 mL EtOAc, washed with 50 mL brine, and dried. The solvent was distilled off and the crude material was purified via flash chromatography, eluting with 5% to 30% ethyl acetate in heptane to afford 3-(6-fluoropyridin-2-yl)-5-(pyridin-3-yl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazolo[3,4-c]pyridine as a yellow solid (148 mg, 80%). ESI MS m/z=421.1 (M+1).

Workup

  1. extractionUpon completion, the reaction mixture was extracted with 100 mL EtOAc
  2. washwashed with 50 mL brine
  3. customdried
  4. distillationThe solvent was distilled off
  5. customthe crude material was purified via flash chromatography
  6. washeluting with 5% to 30% ethyl acetate in heptane

Sources & evidence

ORD record
ord-0f84ab7376ea431799c00c90f52dbb36
Source dataset
uspto-grants-2016_02
Patent number
US09260425B2

Reaction notes

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