Water → Methyl {1-[9-chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]propyl}carbamate

HRID 1628957Notes

Reaction equation

HRID 1628957 reaction equation
[Cl:1][C:2]1[C:10]2[N:9]=[C:8]3[N:11]([C:15]4[CH:20]=[CH:19][C:18]([Cl:21])=[CH:17][C:16]=4[Cl:22])[CH2:12][CH2:13][CH2:14][N:7]3[C:6]=2[C:5]([CH:23]([NH2:26])[CH2:24][CH3:25])=[CH:4][CH:3]=1.C(N(CC)CC)C.Cl[C:35]([O:37][CH3:38])=[O:36].O>O1CCCC1>[Cl:1][C:2]1[C:10]2[N:9]=[C:8]3[N:11]([C:15]4[CH:20]=[CH:19][C:18]([Cl:21])=[CH:17][C:16]=4[Cl:22])[CH2:12][CH2:13][CH2:14][N:7]3[C:6]=2[C:5]([CH:23]([NH:26][C:35](=[O:36])[O:37][CH3:38])[CH2:24][CH3:25])=[CH:4][CH:3]=1

Participants

6

Reactant 4

HCID 962WaterHCID 6586Methyl chloroformateHCID 8471TriethylamineHCID 577863351-[9-Chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]propan-1-amine

Product 1

HCID 57785969Methyl {1-[9-chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]propyl}carbamateYield 28%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of 1-[9-chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]propan-1-amine (100 mg, 0.24 mmol) and triethylamine (0.10 mL, 0.72 mmol) in tetrahydrofuran (5.0 mL) was added methyl chloroformate (0.0377 mL, 0.488 mmol) at 0° C. The mixture was stirred at 0° C. for 1 hr. Water was added to the reaction mixture at room temperature and the mixture was extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate, and concentrated in vacuo. The residue was purified by flash chromatography on silica gel eluting with a 35-65% ethyl acetate/n-hexane gradient mixture and recrystallization from ethyl acetate/n-hexane to give the title compound (31.5 mg, 0.067 mmol, 28%) as colorless crystals.

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe organic layer was washed with brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified by flash chromatography on silica gel eluting with a 35-65% ethyl acetate/n-hexane gradient mixture and recrystallization from ethyl acetate/n-hexane

Sources & evidence

ORD record
ord-731ce5889d5c42efa619769ae8b89226
Source dataset
uspto-grants-2014_07
Patent number
US08785460B2

Reaction notes

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