Diiodomethane → HCID 57785868, compound

HRID 1628849Notes

Reaction equation

HRID 1628849 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]([O:26][CH:27]=[CH2:28])[CH2:24][CH3:25])=[CH:4][CH:3]=1.[CH2:29]([Zn]CC)C.CCCCCC.ICI>ClCCl.C(OCC)(=O)C>[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]([O:26][CH:27]2[CH2:29][CH2:28]2)[CH2:24][CH3:25])=[CH:4][CH:3]=1

Participants

7

Reactant 4

HCID 6346DiiodomethaneHCID 8058HexaneHCID 57785977HCID 57785977, compoundHCID 178418750HCID 178418750, compound

Product 1

HCID 57785868HCID 57785868, compoundYield 92%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a stirred solution of 9-chloro-1-(2,4-dichlorophenyl)-6-[1-(ethenyloxy)propyl]-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole (246 mg, 0.563 mmol) in dichloromethane (5.6 mL) was added a solution of diethyl zinc in hexane (1.0 M, 2.82 mL, 2.82 mmol) and diiodomethane (454 μL, 5.63 mmol) at 0° C. After 1.5 h, the reaction mixture was diluted with ethyl acetate, quenched with aqueous ammonium chloride, washed with water and brine, dried over sodium sulfate, filtered, and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel eluting with a 0-40% ethyl acetate/n-hexane gradient mixture to give the title compound as a pale yellow solid (233 mg, 0.517 mmol, 92%). Analytically pure material was obtained by recrystallization from ethyl acetate/hexane.

Workup

  1. customquenched with aqueous ammonium chloride
  2. washwashed with water and brine
  3. dry with materialdried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by flash column chromatography on silica gel eluting with a 0-40% ethyl acetate/n-hexane gradient mixture

Sources & evidence

ORD record
ord-7f105e451986418d9d005893d494b049
Source dataset
uspto-grants-2014_07
Patent number
US08785460B2

Reaction notes

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