Potassium Carbonate → 7-(2,2-Dimethyl-propyl)-6-(3-methyl-1,4-dioxo-3,4-dihydro-1H-phthalazin-2-ylmethyl)-7H-pyrrolo[2,3-d]pyrimidine-2-carbonitrile

HRID 271609Notes

Reaction equation

HRID 271609 reaction equation
[CH3:1][C:2]([CH3:29])([CH3:28])[CH2:3][N:4]1[C:8]2[N:9]=[C:10]([C:13]#[N:14])[N:11]=[CH:12][C:7]=2[CH:6]=[C:5]1[CH2:15][N:16]1[NH:25][C:24](=[O:26])[C:23]2[C:18](=[CH:19][CH:20]=[CH:21][CH:22]=2)[C:17]1=[O:27].[C:30]([O-])([O-])=O.[K+].[K+]>CN(C=O)C>[CH3:1][C:2]([CH3:29])([CH3:28])[CH2:3][N:4]1[C:8]2[N:9]=[C:10]([C:13]#[N:14])[N:11]=[CH:12][C:7]=2[CH:6]=[C:5]1[CH2:15][N:16]1[N:25]([CH3:30])[C:24](=[O:26])[C:23]2[C:18](=[CH:19][CH:20]=[CH:21][CH:22]=2)[C:17]1=[O:27]

Participants

4

Reactant 2

HCID 11430Potassium CarbonateHCID 689289407-(2,2-dimethyl-propyl)-6-(1,4-dioxo-3,4-dihydro-1H-phthalazin-2-ylmethyl)-7H-pyrrolo[2,3-d)pyrimidine-2-carbonitrile

Product 1

HCID 598346237-(2,2-Dimethyl-propyl)-6-(3-methyl-1,4-dioxo-3,4-dihydro-1H-phthalazin-2-ylmethyl)-7H-pyrrolo[2,3-d]pyrimidine-2-carbonitrileYield 78%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 338 mg (1.3 mmoles) of phthalhydrazide in 20 ml of DMF, 252 mg (1.83 mmoles) of K2CO3 and 400 mg (1.30 mmoles) of 6-Bromomethyl-7-(2,2-dimethyl-propyl)-7H-pyrrolo[2,3-d]pyrimidine-2-carbonitrile are added successively and the mixture is stireed for 18 hours at ambient temperature. The reaction mixture is quenched with ice-water and extracted with AcOEt. The combined extracts are washed with H2O, brine and dried over MgSO4. Chromatography on silica gel (eluent: n-Hexane:AcOEt=1:2) give 412 mg of desired 7-(2,2-dimethyl-propyl)-6-(1,4-dioxo-3,4-dihydro-1H-phthalazin-2-ylmethyl)-7H-pyrrolo[2,3-d]pyrimidine-2-carbonitrile in 70% yield. The obtained product is treated with MeJ under the same conditionto give N-methylated compound. To a solution of 295 mg (0.76 mmoles) of 7-(2,2-dimethyl-propyl)-6-(1,4-dioxo-3,4-dihydro-1H-phthalazin-2-ylmethyl)-7H-pyrrolo[2,3-d]pyrimidine-2-carbonitrile in 20 ml of DMF, 0.066 ml (1.06 mmoles) of MeJ and 168 mg (1.22 mmoles) of K2CO3 are added successively and the mixture is stireed for 18 hours at ambient temperature. The reaction mixture is quenched with ice-water and extracted with AcOEt. The combined extracts are washed with H2O, brine and dried over MgSO4. Chromatography on silica gel (eluent: n-Hexane:AcOEt=1:4) give 238 mg of 7-(2,2-Dimethyl-propyl)-6-(3-methyl-1,4dioxo-3,4-dihydro-1H-phthalazin-2-ylmethyl)-7H-pyrrolo[2,3-d]pyrimidine-2-carbonitrile in 78% yield.

Workup

  1. additionThe obtained product is treated with MeJ under the same
  2. customconditionto give N-methylated compound
  3. customThe reaction mixture is quenched with ice-water
  4. extractionextracted with AcOEt
  5. washThe combined extracts are washed with H2O, brine
  6. dry with materialdried over MgSO4

Sources & evidence

ORD record
ord-3d39022ea3e743049c0010dbd661315c
Source dataset
uspto-grants-2008_11
Patent number
US07452886B2

Reaction notes

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