1-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole → HCID 44545552, compound

HRID 1888595Notes

Reaction equation

HRID 1888595 reaction equation
Br[C:2]1[N:10]=[CH:9][C:8]2[NH:7][C:6]3[N:11]=[CH:12][C:13]([C:15]4[CH:20]=[CH:19][C:18]([CH2:21][N:22]5[CH2:27][CH2:26][CH2:25][CH2:24][CH2:23]5)=[C:17]([O:28][CH3:29])[CH:16]=4)=[CH:14][C:5]=3[C:4]=2[CH:3]=1.[CH3:30][N:31]1[CH:35]=[C:34](B2OC(C)(C)C(C)(C)O2)[CH:33]=[N:32]1>C(=O)([O-])[O-].[Na+].[Na+].C(#N)C.C(OCC)(=O)C>[CH3:29][O:28][C:17]1[CH:16]=[C:15]([C:13]2[CH:12]=[N:11][C:6]3[NH:7][C:8]4[CH:9]=[N:10][C:2]([C:34]5[CH:33]=[N:32][N:31]([CH3:30])[CH:35]=5)=[CH:3][C:4]=4[C:5]=3[CH:14]=2)[CH:20]=[CH:19][C:18]=1[CH2:21][N:22]1[CH2:27][CH2:26][CH2:25][CH2:24][CH2:23]1

Participants

6

Reactant 2

HCID 27739871-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazoleHCID 58266765HCID 58266765, compound

Product 1

HCID 44545552HCID 44545552, compoundYield 17.3%

Reagents, catalysts & solvents 3

HCID 6342AcetonitrileSolventHCID 8857Ethyl AcetateSolventHCID 10340Sodium CarbonateSolvent

Conditions

Temperature
130 °C

Procedure

A degassed mixture of 6-bromo-3-(3-methoxy-4-piperidin-1-ylmethylphenyl)-9H-dipyrido[2,3-b;4′,3′-d]pyrrole (350 mg, 0.78 mmol), 1-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (242 mg, 1.16 mmol), 1,1′-[bis(diphenylphosphino)ferrocene] dichloropalladium(II) (64 mg, 0.08 mmol) in 2N aqueous sodium carbonate solution (8 mL) and acetonitrile (8 mL) was heated under microwave irradiation at 130° C. for 20 minutes. The cooled reaction mixture was diluted with ethyl acetate (75 mL) and washed with water (50 mL). The organic phase was separated, dried over sodium sulfate, filtered and evaporated in vacuo to afford a residue that was purified by flash chromatography (silica, 50 g column, Biotage, 0-25% methanol in DCM) to afford the title compound as an off-white solid (61 mg, 17%). 1H NMR (DMSO-D6, 300 MHz): 8.95-8.92 (m, 2H), 8.85 (d, J=1.0 Hz, 1H), 8.49 (d, J=1.1 Hz, 1H), 8.22 (s, 1H), 8.00 (s, 1H), 7.44 (d, J=7.7 Hz, 1H), 7.38-7.33 (m, 2H), 3.93 (s, 3H), 3.91 (s, 3H), 3.48 (s, 2H), 2.44-2.34 (m, 4H), 1.55-1.48 (m, 4H), 1.45-1.37 (m, 2H).

Workup

  1. customThe cooled reaction mixture
  2. washwashed with water (50 mL)
  3. customThe organic phase was separated
  4. dry with materialdried over sodium sulfate
  5. filtrationfiltered
  6. customevaporated in vacuo
  7. customto afford a residue that
  8. customwas purified by flash chromatography (silica, 50 g column, Biotage, 0-25% methanol in DCM)

Sources & evidence

ORD record
ord-28c5fd4b14f441cabd8827f8a7ea20ec
Source dataset
uspto-grants-2013_08
Patent number
US08501765B2

Reaction notes

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