反応式
[C:1]([NH:4][C:5]1[CH:6]=[C:7](O)[CH:8]=[CH:9][CH:10]=1)(=[O:3])[CH3:2].[N:12]([O-])=[O:13].N([O-])=[O:16].[Na+].N([O-])=O.[K+]>>[N:12]([CH2:2][C:1]([NH:4][C:5]1[CH:6]=[CH:7][CH:8]=[CH:9][C:10]=1[OH:16])=[O:3])=[O:13]参加物
実験手順
According to this scheme 1a, the compounds of formula (Ia) are prepared by reaction of an appropriate 3-acetamidophenol compound (1) with a nitrite (2), such as a sodium nitrite (X=Na), a potassium nitrite (X=K), etc., at a temperature of −3° C. The nitroso acetamidophenol (3) thus obtained is subsequently reacted with 1,3-dihydroxynaphthalene (4) in a solvent such as butanol, by heating to a temperature of approximately 70° C., then adding concentrated sulfuric acid and continuing the heating to 90° C., and then cooling, so as to form the appropriate 9-acetamido-benzo[a]phenoxazin-5-one. The latter compound is subsequently hydrolyzed by heating with moderately concentrated sulfuric acid so as to give the 9-amino-benzo[a]phenoxazin-5-one (5). The last step is equivalent to that of scheme 1.
後処理
- customat a temperature of −3° C
出典と根拠
- ORDレコード
- ord-520c41d065c54d5f8ad958d78d81c2b6
- 出典データセット
- uspto-grants-2008_09
- 特許番号
- US07420054B2
関連ノート
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