Phenyl isocyanate → N-[4-(4-amino-2-butyl-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)butyl]-N'-phenylurea

HRID 1168368Notes

Reaction equation

HRID 1168368 reaction equation
[C:1]1([N:7]=[C:8]=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[NH2:10][C:11]1[C:20]2[N:21]=[C:22]([CH2:29][CH2:30][CH2:31][CH3:32])[N:23]([CH2:24][CH2:25][CH2:26][CH2:27][NH2:28])[C:19]=2[C:18]2[N:17]=[CH:16][CH:15]=[CH:14][C:13]=2[N:12]=1>O1CCCC1>[NH2:10][C:11]1[C:20]2[N:21]=[C:22]([CH2:29][CH2:30][CH2:31][CH3:32])[N:23]([CH2:24][CH2:25][CH2:26][CH2:27][NH:28][C:8]([NH:7][C:1]3[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=3)=[O:9])[C:19]=2[C:18]2[N:17]=[CH:16][CH:15]=[CH:14][C:13]=2[N:12]=1

Participants

4

Reactant 2

HCID 7672Phenyl isocyanateHCID 129926164-(4-amino-2-butyl 1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)butaneamine

Product 1

HCID 12112183N-[4-(4-amino-2-butyl-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)butyl]-N'-phenylureaYield 57.9%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Under a nitrogen atmosphere, phenyl isocyanate (52 μL, 0.48 mmol) was added to a suspension of 4-(4-amino-2-butyl-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)butaneamine (0.15 g, 0.48 mmole) in anhydrous tetrahydrofuran (60 mL). The reaction mixture was stirred for 20 minutes at which time it had turned homogeneous and thin layer chromatography indicated no starting material remained. Aminomethyl resin (280 mg of 1% cross linked, 100-200 mesh available from BACHEM, Torrance, Calif.) was added and the reaction mixture was allowed to stir for 0.5 hr. Silica gel (0.4 g) was added and the mixture was concentrated under vacuum to provide a solid. The solid was purified by flash chromatography eluting with 95/5 dichloromethane/methanol to give a white solid which was dried under vacuum at 60° C. to provide 0.12 g of N-[4-(4-amino-2-butyl-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)butyl]-N′-phenylurea. Analysis: Calculated for C24H29N7O+⅕ H2O: %C, 66.25; %H, 6.81; %N, 22.53; Found: %C, 66.27; %H, 6.63; %N, 22.83

Workup

  1. additionAminomethyl resin (280 mg of 1% cross linked, 100-200 mesh available from BACHEM, Torrance, Calif.) was added
  2. stirringto stir for 0.5 hr
  3. additionSilica gel (0.4 g) was added
  4. concentrationthe mixture was concentrated under vacuum
  5. customto provide a solid
  6. customThe solid was purified by flash chromatography
  7. washeluting with 95/5 dichloromethane/methanol
  8. customto give a white solid which
  9. customwas dried under vacuum at 60° C.

Sources & evidence

ORD record
ord-5fa6f7b05677478180fbe0e00583d174
Source dataset
uspto-grants-2003_09
Patent number
US06624172B2

Reaction notes

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