HCID 57786020, compound → HCID 57786164, compound

HRID 1628914Notes

Reaction equation

[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([CH:25]=[O:26])=[C:6]2[C:10]=1[N:9]=[C:8]1[N:11]([C:15]3[C:20]([Cl:21])=[CH:19][C:18]([O:22][CH3:23])=[CH:17][C:16]=3[Cl:24])[CH2:12][CH2:13][CH2:14][N:7]21.[CH2:27]([Mg]Br)[CH3:28]>O1CCCC1.[Cl-].[NH4+]>[Cl:1][C:2]1[C:10]2[N:9]=[C:8]3[N:11]([C:15]4[C:16]([Cl:24])=[CH:17][C:18]([O:22][CH3:23])=[CH:19][C:20]=4[Cl:21])[CH2:12][CH2:13][CH2:14][N:7]3[C:6]=2[C:5]([CH:25]([OH:26])[CH2:27][CH3:28])=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of 9-chloro-1-(2,6-dichloro-4-methoxyphenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-6-carbaldehyde (146 mg, 0.356 mmol) in tetrahydrofuran (4 mL) was added dropwise ethylmagnesium bromide (3 M solution in diethyl ether, 0.237 mL, 0.711 mmol) at 0° C., and the mixture was stirred at 0° C. for 5 min. The reaction mixture was diluted with aqueous saturated ammonium chloride, and extracted with ethyl acetate. The combined organic layer was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel eluting with a 20-50% ethyl acetate/n-hexane gradient mixture to give the title compound as a colorless solid (137 mg, 0.311 mmol, 87%).

Workup

extractionextracted with ethyl acetate
washThe combined organic layer was washed with brine
dry with materialdried over anhydrous sodium sulfate
filtrationfiltered
concentrationconcentrated in vacuo
customThe residue was purified by flash column chromatography on silica gel eluting with a 20-50% ethyl acetate/n-hexane gradient mixture

Sources & evidence

ORD record: ord-fc59ca2027884d7a925d7c3b65f03909
Source dataset: uspto-grants-2014_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08785460B2

Reaction notes

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