Potassium Carbonate → phenylmethyl 3-(4-amino-6-methyl-1H-indazol-1-yl)benzoate

HRID 549514Notes

Reaction equation

HRID 549514 reaction equation
Cl.[CH3:2][C:3]1[CH:4]=[C:5]([NH2:12])[C:6]2[CH:7]=[N:8][NH:9][C:10]=2[CH:11]=1.I[C:14]1[CH:15]=[C:16]([CH:27]=[CH:28][CH:29]=1)[C:17]([O:19][CH2:20][C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1)=[O:18].C(=O)([O-])[O-].[K+].[K+].CN[C@@H]1CCCC[C@H]1NC>CN(C=O)C.[Cu]I.C(OCC)(=O)C.O>[NH2:12][C:5]1[CH:4]=[C:3]([CH3:2])[CH:11]=[C:10]2[C:6]=1[CH:7]=[N:8][N:9]2[C:14]1[CH:15]=[C:16]([CH:27]=[CH:28][CH:29]=1)[C:17]([O:19][CH2:20][C:21]1[CH:22]=[CH:23][CH:24]=[CH:25][CH:26]=1)=[O:18]

Participants

9

Reactant 4

HCID 11430Potassium CarbonateHCID 2733821trans-N,N'-dimethyl-1,2-cyclohexanediamineHCID 22254461Benzyl 3-iodobenzoateHCID 66648350HCID 66648350, compound

Product 1

HCID 59010011phenylmethyl 3-(4-amino-6-methyl-1H-indazol-1-yl)benzoateYield 32.3%

Reagents, catalysts & solvents 4

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

6-Methyl-1H-indazol-4-amine hydrochloride (0.5 g, 2.7 mmol), phenylmethyl 3-iodobenzoate (0.9 g, 2.6 mmol), copper (I) iodide (14 mg, 0.07 mmol), potassium carbonate (1.2 g, 8.68 mmol) and trans-N,N′-dimethyl-1,2-cyclohexanediamine (20 mg, 0.14 mmol) were heated together in DMF (5 mL) at reflux overnight. The mixture was poured into water (15 mL) and ethyl acetate was added to dissolve the resulting oil. The suspension was then filtered through celite. The organic phase was separated, combined with a second ethyl acetate extract, washed successively with water and brine and then dried over anhydrous sodium sulphate and evaporated under reduced pressure. The residue was purified by silica gel column chromatography (75 g) eluting with 1 to 5% gradient of ethyl acetate in dichloromethane to give the title compound as a light brown oil (0.3 g).

Workup

  1. temperatureat reflux overnight
  2. additionwas added
  3. dissolutionto dissolve the resulting oil
  4. filtrationThe suspension was then filtered through celite
  5. customThe organic phase was separated
  6. extractionextract
  7. washwashed successively with water and brine
  8. dry with materialdried over anhydrous sodium sulphate
  9. customevaporated under reduced pressure
  10. customThe residue was purified by silica gel column chromatography (75 g)
  11. washeluting with 1 to 5% gradient of ethyl acetate in dichloromethane

Sources & evidence

ORD record
ord-92d902b491c44d9589d6858c8c2895c6
Source dataset
uspto-grants-2011_05
Patent number
US07943651B2

Reaction notes

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