Oxalic Acid → (E)-1-(2-Pyridyl)-2-styryl-5-methoxy-1H-benzimidazole oxalate

HRID 382563Notes

Reaction equation

HRID 382563 reaction equation
[CH3:1][O:2]C1C=CC(N)=C([N+]([O-])=O)C=1.[N:13]1[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=1[N:19]1[C:23]2[CH:24]=[CH:25][C:26](C(F)(F)F)=[CH:27][C:22]=2[N:21]=[C:20]1/[CH:32]=[CH:33]/[C:34]1[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=1.[C:40]([OH:45])(=[O:44])[C:41]([OH:43])=[O:42]>C(OCC)(=O)C>[C:40]([OH:45])(=[O:44])[C:41]([OH:43])=[O:42].[N:13]1[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=1[N:19]1[C:23]2[CH:24]=[CH:25][C:26]([O:2][CH3:1])=[CH:27][C:22]=2[N:21]=[C:20]1/[CH:32]=[CH:33]/[C:34]1[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=1

Participants

5

Reactant 3

HCID 971Oxalic AcidHCID 667934-Methoxy-2-nitroanilineHCID 22736704(E)-1-(2-pyridyl)-2-styryl-5-trifluoromethyl-1H-benzimidazole

Product 1

HCID 22736663(E)-1-(2-Pyridyl)-2-styryl-5-methoxy-1H-benzimidazole oxalate

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

Free base of the titled compound was prepared from 4-methoxy-2-nitroaniline according to the preparation of (E)-1-(2-pyridyl)-2-styryl-5-trifluoromethyl-1H-benzimidazole (Example 57). 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-5872926846fe4492bb50038949309a5a
Source dataset
uspto-grants-2001_10
Patent number
US06310079B1

Reaction notes

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