Sodium Carbonate → HCID 90414470, compound

HRID 64211Notes

Reaction equation

HRID 64211 reaction equation
Br[C:2]1[CH:12]=[CH:11][CH:10]=[C:9]([O:13][CH3:14])[C:3]=1[C:4]([O:6][CH2:7][CH3:8])=[O:5].CC1(C)C(C)(C)OB([C:23]2[NH:27][N:26]=[CH:25][CH:24]=2)O1.C([O-])([O-])=O.[Na+].[Na+]>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>[CH3:14][O:13][C:9]1[CH:10]=[CH:11][CH:12]=[C:2]([C:23]2[NH:27][N:26]=[CH:25][CH:24]=2)[C:3]=1[C:4]([O:6][CH2:7][CH3:8])=[O:5]

Participants

7

Reactant 3

HCID 10340Sodium CarbonateHCID 219315393-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazoleHCID 46311273Ethyl 2-bromo-6-methoxybenzoate

Product 1

HCID 90414470HCID 90414470, compoundYield 33%

Reagents, catalysts & solvents 3

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

Conditions

Temperature
100 °C

Procedure

In a microwave vial was dissolved ethyl 2-bromo-6-methoxybenzoate (500 mg, 1.54 mmol) and 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (330 mg, 1.70 mmol) in DME (10 mL) and water (2 mL). Na2CO3 (259 mg, 3.09 mmol) was then added followed by Pd(PPh3)4 (89 mg, 0.077 mmol) and the reaction mixture was degassed with N2 for 10 minutes. The reaction mixture was then heated at 100° C. for 1 h in the microwave. The mixture was cooled to room temperature, filtered through Celite and washed with EtOAc and DCM. The crude solution was concentrated in vacuo and directly purified via silica gel chromatography (10-80% EtOAc in hexanes) to afford the title compound (125 mg, 33%). MS (ESI) mass calcd. for C13H14N2O3, 246.3. m/z found 247.1 [M+H]+. 1H NMR (400 MHz, Chloroform-d) δ 7.63 (d, J=2.2 Hz, 1H), 7.44-7.37 (m, 1H), 7.24 (d, J=8.1 Hz, 1H), 6.94 (dd, J=8.3, 0.9 Hz, 1H), 6.53 (d, J=2.3 Hz, 1H), 4.29 (q, J=7.2 Hz, 2H), 3.88 (s, 3H), 1.25-1.16 (m, 3H).

Workup

  1. customthe reaction mixture was degassed with N2 for 10 minutes
  2. temperatureThe mixture was cooled to room temperature
  3. filtrationfiltered through Celite
  4. washwashed with EtOAc and DCM
  5. concentrationThe crude solution was concentrated in vacuo
  6. customdirectly purified via silica gel chromatography (10-80% EtOAc in hexanes)

Sources & evidence

ORD record
ord-47869566c0b547779a407a11d4277420
Source dataset
uspto-grants-2016_09
Patent number
US09447117B2

Reaction notes

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