3-(Methoxycarbonyl)benzeneboronic acid → Methyl 3-{2-methyl-3-[(2-methyl-4-oxo-3,4-dihydroquinazolin-6-yl)-carbonyl]indolizin-1-yl}benzoate

HRID 535457Notes

Reaction equation

HRID 535457 reaction equation
[CH3:1][O:2][C:3]([C:5]1[CH:6]=[C:7](B(O)O)[CH:8]=[CH:9][CH:10]=1)=[O:4].O.O.P([O-])([O-])([O-])=O.[K+].[K+].[K+].Br[C:25]1[C:26]([CH3:48])=[C:27]([C:34]([C:36]2[CH:37]=[C:38]3[C:43](=[CH:44][CH:45]=2)[N:42]=[C:41]([CH3:46])[NH:40][C:39]3=[O:47])=[O:35])[N:28]2[C:33]=1[CH:32]=[CH:31][CH:30]=[CH:29]2>O.CN(C=O)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>[CH3:48][C:26]1[C:25]([C:7]2[CH:6]=[C:5]([CH:10]=[CH:9][CH:8]=2)[C:3]([O:2][CH3:1])=[O:4])=[C:33]2[N:28]([C:27]=1[C:34]([C:36]1[CH:37]=[C:38]3[C:43](=[CH:44][CH:45]=1)[N:42]=[C:41]([CH3:46])[NH:40][C:39]3=[O:47])=[O:35])[CH:29]=[CH:30][CH:31]=[CH:32]2

Participants

7

Reactant 3

HCID 27347143-(Methoxycarbonyl)benzeneboronic acidHCID 23436936Potassium phosphate dihydrateHCID 1363654746-[(1-bromo-2-methylindolizin-3-yl)carbonyl]-2-methylquinazolin-4(3H)-one

Product 1

HCID 136365475Methyl 3-{2-methyl-3-[(2-methyl-4-oxo-3,4-dihydroquinazolin-6-yl)-carbonyl]indolizin-1-yl}benzoateYield 58.6%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
150 °C

Procedure

0.139 g (0.78 mmol) of [3-(methoxycarbonyl)phenyl]boronic acid, 0.321 g (1.29 mmol) of potassium phosphate dihydrate dissolved in 0.81 ml of water, and 0.0149 g (0.01 mmol) of tetrakis(triphenylphosphine)palladium are added, under an argon atmosphere at ambient temperature, to 0.256 g (0.65 mmol) of 6-[(1-bromo-2-methylindolizin-3-yl)carbonyl]-2-methylquinazolin-4(3H)-one in 9 ml of DMF. The reaction medium is microwave-heated at 150° C. for 15 minutes. After dilution with ethyl acetate, the organic phase is washed with a 1N aqueous solution of hydrochloric acid and then a saturated aqueous solution of sodium chloride, dried over sodium sulphate, filtered, and then concentrated under reduced pressure. The solid obtained is purified by silica gel column chromatography, elution being carried out with a dichloromethane/methanol (95/2) mixture. 172 mg of a yellow solid are obtained.

Workup

  1. washAfter dilution with ethyl acetate, the organic phase is washed with a 1N aqueous solution of hydrochloric acid
  2. dry with materiala saturated aqueous solution of sodium chloride, dried over sodium sulphate
  3. filtrationfiltered
  4. concentrationconcentrated under reduced pressure
  5. customThe solid obtained
  6. customis purified by silica gel column chromatography, elution

Sources & evidence

ORD record
ord-9fa617bd4b40479ab9e65213502979b4
Source dataset
uspto-grants-2014_10
Patent number
US08859544B2

Reaction notes

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