Tetrahydrofuran → HCID 178498566、化合物
反応式
O1CCCC1.[C:6]([C:10]1[C:11]([C:22]([OH:24])=O)=[N:12][C:13]2[C:18]([C:19]=1[OH:20])=[CH:17][CH:16]=[C:15]([Cl:21])[CH:14]=2)([O:8][CH3:9])=[O:7].S(Cl)([Cl:27])=O>>[C:6]([C:10]1[C:11]([C:22]([Cl:27])=[O:24])=[N:12][C:13]2[C:18]([C:19]=1[OH:20])=[CH:17][CH:16]=[C:15]([Cl:21])[CH:14]=2)([O:8][CH3:9])=[O:7]参加物
反応条件
- 温度
- 0 °C
実験手順
The free base of 4-(trifluoromethoxy)phenyl hydrazine was prepared from the hydrochloride salt by treatment of the suspended salt (400 mg, 1.75 mM) in ethyl acetate (50 mL) with 2N sodium hydroxide(50 mL). The organic layer was separated, dried over magnesium sulfate and concentrated in vacuo to provide the free base of 4-(trifluoromethoxy)phenyl hydrazine (325 mg, 1.69 mM). This material was placed into anhydrous tetrahydrofuran (5 mL) and cooled to 0° C. under a nitrogen atmosphere. Concurrently, 3-carbomethoxy-7-chloro-4-hydroxyquinoline-2-carbonyl chloride was prepared from 3-carbomethoxy-7-chloro-4-hydroxyquinoline-2-carboxylic acid (121 mg, 0.43 mM) by heating to 60° C. in thionyl chloride (4 mL). After 3 hours the crude acid chloride was isolated by distilling away the excess thionyl chloride. The crude3-carbomethoxy-7-chloro-4-hydroxyquinoline-2-carbonyl chloride (130 mg, 0.43 mM) was then placed in anhydrous tetrahydrofuran (3 mL) at ambient temperature and added via cannula to the 4-(trifluoromethoxy)phenyl hydrazine solution. After 30 minutes the reaction mixture was poured into 1.0N hydrochloric acid producing a precipitate. The solid was isolated to yield the title compound (185 mg, 95%) as an off-white solid, mp 346-350° C.; MS 456 (M+H).
後処理
- customAfter 3 hours the crude acid chloride was isolated
出典と根拠
- ORDレコード
- ord-39b74bd37f284d87bdaeaaa1e28ddb62
- 出典データセット
- uspto-grants-2001_05
- 特許番号
- US06232313B1
反応ノート
読み込み中…