Potassium Carbonate → HCID 57826760, compound

HRID 2391994Notes

Reaction equation

HRID 2391994 reaction equation
Br[C:2]1[S:6][C:5]([C:7]([O:9][CH3:10])=[O:8])=[CH:4][C:3]=1[CH3:11].C([O-])([O-])=O.[K+].[K+].CC1(C)COB([C:25]2[N:29]([CH3:30])[N:28]=[CH:27][CH:26]=2)OC1>O1CCOCC1.O.CC(C)([P](C(C)(C)C)([Pd][P](C(C)(C)C)(C(C)(C)C)C(C)(C)C)C(C)(C)C)C.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>[CH3:11][C:3]1[CH:4]=[C:5]([C:7]([O:9][CH3:10])=[O:8])[S:6][C:2]=1[C:25]1[N:29]([CH3:30])[N:28]=[CH:27][CH:26]=1

Participants

7

Reactant 3

HCID 11430Potassium CarbonateHCID 2795489Methyl 5-bromo-4-methylthiophene-2-carboxylateHCID 441194445-(5,5-Dimethyl-1,3,2-dioxaborinan-2-YL)-1-methyl-1H-pyrazole2×

Product 1

HCID 57826760HCID 57826760, compound

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 178418851HCID 178418851, compoundCatalystHCID 218864351,4-Dioxane--water (1/1)Solvent

Conditions

Temperature
80 °C

Procedure

To a solution of methyl 5-bromo-4-methyl-2-thiophenecarboxylate (1 g, 4.25 mmol) in dioxane/H2O (5:1, 20 mL) was added K2CO3 (2.3 g, 17 mmol), bis(tri-t-butylphosphine)palladium(0) (108 mg, 0.213 mmol) and 5-(5,5-dimethyl-1,3,2-dioxaborinane-2-yl)-1-methyl-1H-pyrazole (1.2 g, 5.52 mmol). The reaction mixture was heated to 80° C. in a sealed tube for 2 h and additional tetrakistriphenylphosphine Pd(0) (279 mg, 0.241 mmol) and 5-(5,5-dimethyl-1,3,2-dioxaborinane-2-yl)-1-methyl-1H-pyrazole (1.2 g, 6.27 mmol) were added. After 12 h, the reaction was partitioned between H2O-DCM and the aqueous phase was washed several times with DCM. The combined organic fractions were dried over Na2SO4, concentrated and used directly without further purification: LCMS (ES) m/z=237 (M+H)+.

Workup

  1. customthe reaction was partitioned between H2O-DCM
  2. washthe aqueous phase was washed several times with DCM
  3. dry with materialThe combined organic fractions were dried over Na2SO4
  4. concentrationconcentrated
  5. customused directly without further purification

Sources & evidence

ORD record
ord-4813be971fd34400b912d26f92d23611
Source dataset
uspto-grants-2012_09
Patent number
US08273782B2

Reaction notes

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