3-Pyridinylboronic acid → 3-(4-Fluorobenzyl)-1-methyl-6-[(1-pyridin-3-ylimidazo[1,5-a]pyridin-3-yl)carbonyl]quinazoline-2,4(1H,3H)-dione

HRID 409548Notes

Reaction equation

HRID 409548 reaction equation
[N:1]1[CH:6]=[CH:5][CH:4]=[C:3](B(O)O)[CH:2]=1.O.O.P([O-])([O-])([O-])=O.[K+].[K+].[K+].Br[C:21]1[N:22]=[C:23]([C:30]([C:32]2[CH:33]=[C:34]3[C:39](=[CH:40][CH:41]=2)[N:38]([CH3:42])[C:37](=[O:43])[N:36]([CH2:44][C:45]2[CH:50]=[CH:49][C:48]([F:51])=[CH:47][CH:46]=2)[C:35]3=[O:52])=[O:31])[N:24]2[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=12>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>[F:51][C:48]1[CH:49]=[CH:50][C:45]([CH2:44][N:36]2[C:35](=[O:52])[C:34]3[C:39](=[CH:40][CH:41]=[C:32]([C:30]([C:23]4[N:24]5[CH:29]=[CH:28][CH:27]=[CH:26][C:25]5=[C:21]([C:3]5[CH:2]=[N:1][CH:6]=[CH:5][CH:4]=5)[N:22]=4)=[O:31])[CH:33]=3)[N:38]([CH3:42])[C:37]2=[O:43])=[CH:46][CH:47]=1

Participants

7

Reactant 3

HCID 27343783-Pyridinylboronic acidHCID 23436936Potassium phosphate dihydrateHCID 866834546-[(1-Bromoimidazo[1,5-a]pyridin-3-yl)carbonyl]-3-(4-fluorobenzyl)-1-methylquinazoline-2,4(1H,3H)-dione

Product 1

HCID 565975113-(4-Fluorobenzyl)-1-methyl-6-[(1-pyridin-3-ylimidazo[1,5-a]pyridin-3-yl)carbonyl]quinazoline-2,4(1H,3H)-dioneYield 87.9%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
150 °C

Procedure

0.04 g (0.32 mmol) of 3-pyridylboronic acid, 0.2 g (0.81 mmol) of potassium phosphate dihydrate dissolved in 0.29 ml of water, and 6.2 mg (0.01 mmol) of tetrakis(triphenylphosphine)palladium are added to 0.15 g (0.27 mmol) of 6-[(1-bromoimidazo[1,5-a]pyridin-3-yl)carbonyl]-3-(4-fluorobenzyl)-1-methylquinazoline-2,4(1H,3H)-dione in 3 ml of DMF under an inert argon atmosphere. The reaction medium is microwave-heated at 150° C. for 20 minutes. After filtration over talc, the reaction medium is concentrated under reduced pressure. The residue obtained is purified by silica gel column chromatography, elution being carried out with a dichloromethane/methanol (95/5) mixture. 0.12 g of a yellow solid is obtained.

Workup

  1. filtrationAfter filtration over talc
  2. concentrationthe reaction medium is concentrated under reduced pressure
  3. customThe residue obtained
  4. customis purified by silica gel column chromatography, elution

Sources & evidence

ORD record
ord-9f9e3cffaddc45e397c7f27535a25d93
Source dataset
uspto-grants-2014_06
Patent number
US08759344B2

Reaction notes

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