反応式
[CH3:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2([C:11]([OH:13])=[O:12])[CH2:10][CH2:9]2)=[CH:4][CH:3]=1.F[B-](F)(F)F.[O:19]=[N+:20]=[O:21]>S1(CCCC1)(=O)=O>[CH3:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2([C:11]([OH:13])=[O:12])[CH2:9][CH2:10]2)=[CH:6][C:7]=1[N+:20]([O-:21])=[O:19]参加物
4
実験手順
Commercially available 1-(4-methylphenyl)-1-cyclopropane carboxylic acid is treated with nitronium tetrafluoroborate in sulfolane to afford 1-(4-methyl-3-nitrophenyl)-1-cyclopropane carboxylic acid. This is converted to 1-(4-methyl-3-nitrophenyl)-1-bromocyclopropane by treatment with mercuric oxide and bromine in methylene chloride. Reduction with zinc dust in the presence of calcium chloride in aqueous ethanol affords 5-cyciopropyl-2-methylaniline. Conversion to 4-cyclopropyl-5-(2-imidazolinylamino)-7-methylbenzimidazole is completed in the same manner as 4-ethyl-5-(2-imidazolinylamino)-7-methylbenzimidazole (see Example 2).
出典と根拠
- ORDレコード
- ord-4f369910b121440998f40a296777283f
- 出典データセット
- uspto-grants-2002_11
- 特許番号
- US06486190B1
関連ノート
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