Sodium Carbonate → 4-[[1-[(4-fluorophenyl)methyl]-1H-benzimidazol-2-yl]amino]-1-piperidinebutanenitrile

HRID 2309499Notes

Reaction equation

Cl[CH2:2][CH2:3][CH2:4][C:5]#[N:6].Br.Br.[F:9][C:10]1[CH:15]=[CH:14][C:13]([CH2:16][N:17]2[C:21]3[CH:22]=[CH:23][CH:24]=[CH:25][C:20]=3[N:19]=[C:18]2[NH:26][CH:27]2[CH2:32][CH2:31][NH:30][CH2:29][CH2:28]2)=[CH:12][CH:11]=1.C(=O)([O-])[O-].[Na+].[Na+]>CN(C)C=O>[F:9][C:10]1[CH:15]=[CH:14][C:13]([CH2:16][N:17]2[C:21]3[CH:22]=[CH:23][CH:24]=[CH:25][C:20]=3[N:19]=[C:18]2[NH:26][CH:27]2[CH2:28][CH2:29][N:30]([CH2:2][CH2:3][CH2:4][C:5]#[N:6])[CH2:31][CH2:32]2)=[CH:12][CH:11]=1

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture of 11.5 parts of 4-chlorobutanenitrile, 48.5 parts of 1-(4-fluorophenylmethyl)-N-(4-piperidinyl)-1H-benzimidazol-2-amine dihydrobromide, 30 parts of sodium carbonate and 270 parts of N,N-dimethylformamide was stirred and heated overnight at 70° C. The reaction mixture was poured onto water and the product was extracted with trichloromethane. The extract was dried, filtered and evaporated. The residue was crystallized twice from a mixture of 4-methyl-2-pentanone and 2,2'-oxybispropane, yielding 2.2 parts (80%) of 4-[[1-[(4-fluorophenyl)methyl]-1H-benzimidazol-2-yl]amino]-1-piperidinebutanenitrile; mp. 130.5° C. (intermediate 94).

Workup

additionThe reaction mixture was poured onto water
extractionthe product was extracted with trichloromethane
customThe extract was dried
filtrationfiltered
customevaporated
customThe residue was crystallized twice from a mixture of 4-methyl-2-pentanone and 2,2'-oxybispropane

Sources & evidence

ORD record: ord-2174be42d5224fd195fdfdaea5073929
Source dataset: uspto-grants-1987_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04695569

Reaction notes

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