Toluene → 2,2-Bis(4-methylphenyl)hexafluoropropane
反応式
[F:1][C:2]([F:10])([F:9])[C:3]([C:5]([F:8])([F:7])[F:6])=O.F.[C:12]1([CH3:18])[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1>>[CH3:18][C:12]1[CH:17]=[CH:16][C:15]([C:3]([C:15]2[CH:16]=[CH:17][C:12]([CH3:18])=[CH:13][CH:14]=2)([C:5]([F:8])([F:7])[F:6])[C:2]([F:10])([F:9])[F:1])=[CH:14][CH:13]=1参加物
実験手順
It has been disclosed in U.S. Pat. No. 3,310,573 to react toluene with hexafluoroacetone in the presence of hydrofluoric acid to give 2,2-bis-(4-methylphenyl)hexafluoropropane (2). This is oxidized to the dicarboxylic acid (3) using chromium(III) oxide, which is subsequently converted into the 2,2-bis-(4-aminophenyl)hexafluoropropane (4) by a Schmidt reaction using sodium azide/sulfuric acid. In the next reaction steps, this compound is acetylated using acetic anhydride and then nitrated in the 3-position using 70% strength nitric acid in concentrated sulfuric acid. The elimination of the acetyl group then takes place, for which the nitrated substance is dissolved in concentrated sulfuric acid and water added until the 2,2-bis-(3-nitro-4-aminophenyl)hexafluoropropane (5) precipitates from the solution.
出典と根拠
- ORDレコード
- ord-7028e56870094d91bf62b253a2508553
- 出典データセット
- uspto-grants-1990_05
- 特許番号
- US04922019
反応ノート
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