Oxalic Acid → (E)-5-Fluoro-1-(2-pyridyl)-2-[2-(2-thienyl)ethenyl]-1H-benzimidazole oxalate

HRID 382579Notes

Reaction equation

HRID 382579 reaction equation
[F:1][C:2]1[CH:14]=[CH:13][C:5]([NH:6][C:7]2[CH:12]=[CH:11][CH:10]=[CH:9][N:8]=2)=[C:4]([NH2:15])[CH:3]=1.[S:16]1[CH:20]=[CH:19][CH:18]=[C:17]1/[CH:21]=[CH:22]/[C:23](Cl)=O.N1C=CC=CC=1N1C2C=CC=CC=2N=C1/C=C/C1C=CC=CC=1.[C:49]([OH:54])(=[O:53])[C:50]([OH:52])=[O:51]>C(OCC)(=O)C>[C:49]([OH:54])(=[O:53])[C:50]([OH:52])=[O:51].[F:1][C:2]1[CH:14]=[CH:13][C:5]2[N:6]([C:7]3[CH:12]=[CH:11][CH:10]=[CH:9][N:8]=3)[C:23](/[CH:22]=[CH:21]/[C:17]3[S:16][CH:20]=[CH:19][CH:18]=3)=[N:15][C:4]=2[CH:3]=1

Participants

6

Reactant 4

HCID 971Oxalic AcidHCID 9796241(E)-1-(2-pyridyl)-2-styryl-1H-benzimidazoleHCID 112637803-(2-Thienyl)acryloyl chlorideHCID 227367454-fluoro-2-amino-N-(2-pyridyl)aniline

Product 1

HCID 22736676(E)-5-Fluoro-1-(2-pyridyl)-2-[2-(2-thienyl)ethenyl]-1H-benzimidazole oxalate

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

Free base of the titled compound was prepared from 4-fluoro-2-amino-N-(2-pyridyl)aniline and (E)-3-(2-thienyl)acryloyl chloride according to the preparation of (E)-1-(2-pyridyl)-2-styryl-1H-benzimidazole (Example 1, method A). The free base and oxalic acid were dissolved into ethyl acetate. Concentration and recrystallization from ethyl acetate/n-hexane yielded the titled compound.

Workup

  1. concentrationConcentration and recrystallization from ethyl acetate/n-hexane

Sources & evidence

ORD record
ord-9dd81abf149e4438b4ad006a55a6b753
Source dataset
uspto-grants-2001_10
Patent number
US06310079B1

Reaction notes

Loading…