Methyl iodide → HCID 24963716, compound

HRID 2055632Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[C:6]([C:8]#[C:9][C:10]2[N:11]=[C:12]([CH3:23])[N:13]([C:15]3[CH:20]=[C:19]([F:21])[CH:18]=[C:17]([F:22])[CH:16]=3)[CH:14]=2)[CH:5]=[CH:4][N:3]=1.[CH:24]([N-]C(C)C)(C)C.[Li+].IC>C1COCC1>[Cl:1][C:2]1[CH:7]=[C:6]([C:8]#[C:9][C:10]2[N:11]=[C:12]([CH3:23])[N:13]([C:15]3[CH:20]=[C:19]([F:21])[C:18]([CH3:24])=[C:17]([F:22])[CH:16]=3)[CH:14]=2)[CH:5]=[CH:4][N:3]=1

Participants

Conditions

Temperature: -75 °C

Procedure

2-Chloro-4-[1-(3,5-difluoro-phenyl)-2-methyl-1H-imidazol-4-ylethynyl]-pyridine (200 mg, 0.607 mmol) was dissolved in 10 mL THF and cooled to −75° C. Lithiumdiisopropylamide (0.45 ml, 0.91 mmol) was added and the mixture stirred for 15 min at −75° C. Iodomethane (0.05 ml, 0.85 mmol) was added and stirring was continued at −75° C. for 2 hrs. The reaction mixture was quenched with sat. NaHCO3— solution and extracted with water and ethyl acetate. The combined organic extracts were dried with sodium sulfate, filtered and evaporated. The crude product was purified by flash chromatography on silica gel (heptane/ethylacetate 90:10→20:80 gradient) and by recrystallization from ethyl acetate. The desired compound was obtained as a white solid (40 mg, 19%), MS: m/e=344.5 (M+H+).

Workup

stirringstirring
waitwas continued at −75° C. for 2 hrs
customThe reaction mixture was quenched with sat. NaHCO3— solution
extractionextracted with water and ethyl acetate
dry with materialThe combined organic extracts were dried with sodium sulfate
filtrationfiltered
customevaporated
customThe crude product was purified by flash chromatography on silica gel (heptane/ethylacetate 90:10→20:80 gradient) and by recrystallization from ethyl acetate

Sources & evidence

ORD record: ord-8fec92d05ab448b19f4f6967b61dcd4b
Source dataset: uspto-grants-2008_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07332510B2

Reaction notes

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