3-Hydroxy-2-naphthoic acid → 3-Hydroxy-N-benzimidazolon-5-yl-2-naphthamide
Reaction equation
[NH2:1][C:2]1[CH:11]=[CH:10][C:5]2=[N:6][C:7](=[O:9])[N:8]=[C:4]2[CH:3]=1.[OH:12][C:13]1[C:14]([C:23](O)=[O:24])=[CH:15][C:16]2[C:21]([CH:22]=1)=[CH:20][CH:19]=[CH:18][CH:17]=2>>[OH:12][C:13]1[C:14]([C:23]([NH:1][C:2]2[CH:11]=[CH:10][C:5]3=[N:6][C:7](=[O:9])[N:8]=[C:4]3[CH:3]=2)=[O:24])=[CH:15][C:16]2[C:21]([CH:22]=1)=[CH:20][CH:19]=[CH:18][CH:17]=2Participants
3
Procedure
The product thus obtained is fit for the preparation of azo pigments of high fastness and according to HPLC contains <0.1% of 5-aminobenzimidazolone and <0.1% of 3-hydroxy-2-naphthoic acid.
Workup
- customThe product thus obtained
Sources & evidence
- ORD record
- ord-2ef7f7f9e1cf4b41ae72dd74819e48df
- Source dataset
- uspto-grants-1998_05