Potassium Carbonate → (Z)-5-(but-2-en-2-yl)-1-(2-fluoro-4-hydroxyphenyl)-3-methyl-1H-pyrazole-4-carbonitrile

HRID 1410168Notes

Reaction equation

HRID 1410168 reaction equation
[F:1][C:2]1[CH:7]=[C:6]([OH:8])[CH:5]=[CH:4][C:3]=1[N:9]1[C:13](I)=[C:12]([C:15]#[N:16])[C:11]([CH3:17])=[N:10]1.[CH3:18]/[C:19](/B(O)O)=[CH:20]/[CH3:21].C([O-])([O-])=O.[K+].[K+]>COCCOC.O.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>[CH3:18]/[C:19](/[C:13]1[N:9]([C:3]2[CH:4]=[CH:5][C:6]([OH:8])=[CH:7][C:2]=2[F:1])[N:10]=[C:11]([CH3:17])[C:12]=1[C:15]#[N:16])=[CH:20]/[CH3:21]

Participants

7

Reactant 3

HCID 11430Potassium CarbonateHCID 11389361(E)-But-2-EN-2-ylboronic acidHCID 671200291-(2-fluoro-4-hydroxyphenyl)-5-iodo-3-methyl-1H-pyrazole-4-carbonitrile

Product 1

HCID 67120037(Z)-5-(but-2-en-2-yl)-1-(2-fluoro-4-hydroxyphenyl)-3-methyl-1H-pyrazole-4-carbonitrileYield 73%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolvent

Procedure

A mixture of 1-(2-fluoro-4-hydroxyphenyl)-5-iodo-3-methyl-1H-pyrazole-4-carbonitrile (40 mg, 0.12 mmol), (E)-but-2-en-2-ylboronic acid (23.3 mg, 0.23 mmol), K2CO3 (96.7 mg, 0.70 mmol) and Pd(PPh3)4 (13.47 mg, 0.01 mmol) in DME (1 mL) and water (1 mL) was flushed with N2 and irradiated in the microwave at 150° C. for 10 min. Water and DCM were added and the phases were separated. The organic layer was concentrated and the crude product was purified on HPLC to give (Z)-5-(but-2-en-2-yl)-1-(2-fluoro-4-hydroxyphenyl)-3-methyl-1H-pyrazole-4-carbonitrile (23.0 mg, 73%).

Workup

  1. customwas flushed with N2
  2. customirradiated in the microwave at 150° C. for 10 min
  3. additionWater and DCM were added
  4. customthe phases were separated
  5. concentrationThe organic layer was concentrated
  6. customthe crude product was purified on HPLC

Sources & evidence

ORD record
ord-2cfff2f83352425381cbeb81328e9a01
Source dataset
uspto-grants-2014_12
Patent number
US08921402B2

Reaction notes

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