Water → 2-(3-Bromo-phenyl)-6-chloro-4-hydroxy-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-8-carboxylic acid methyl ester

HRID 1801105

反応式

HRID 1801105 の反応式
[CH3:1][O:2][C:3](=[O:20])[C:4]1[CH:9]=[C:8]([Cl:10])[CH:7]=[CH:6][C:5]=1[N:11]=[CH:12][C:13]1[CH:18]=[CH:17][CH:16]=[C:15]([Br:19])[CH:14]=1.O.[O-]S(C(F)(F)F)(=O)=O.[Yb+3].[O-]S(C(F)(F)F)(=O)=O.[O-]S(C(F)(F)F)(=O)=O.[CH:47](=[O:51])[CH:48]([CH3:50])[CH3:49].O>O1CCCC1>[CH3:1][O:2][C:3]([C:4]1[CH:9]=[C:8]([Cl:10])[CH:7]=[C:6]2[C:5]=1[NH:11][CH:12]([C:13]1[CH:18]=[CH:17][CH:16]=[C:15]([Br:19])[CH:14]=1)[C:48]([CH3:50])([CH3:49])[CH:47]2[OH:51])=[O:20]

参加物

6

反応物 4

HCID 962WaterHCID 6561IsobutyraldehydeHCID 45075687Ytterbium(3+) trifluoromethanesulfonate--water (1/3/1)HCID 674425752-[(3-Bromo-benzylidene)-amino]-5-chloro-benzoic acid methyl ester

生成物 1

HCID 674415842-(3-Bromo-phenyl)-6-chloro-4-hydroxy-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-8-carboxylic acid methyl ester収率 99.8%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

反応条件

温度
25 °C

実験手順

To a stirred mixture solution of 2-[(3-bromo-benzylidene)-amino]-5-chloro-benzoic acid methyl ester (39.8 g, 113.2 mmol) and ytterbium(III) triflate hydrate (10.5 g, 16.9 mmol) in dry tetrahydrofuran (100 mL) at 25° C. was added isobutyraldehyde (10.4 mL, 113.2 mmol) and water (2.1 mL, 113.2 mmol) dropwise. The reaction mixture was stirred at 25° C. for 16 h. Then the reaction mixture was concentrated in vacuo and the residue was extracted with ethyl acetate (2×200 mL), washed with brine, dried over anhydrous sodium sulfate and concentrated in vacuo to afford 2-(3-bromo-phenyl)-6-chloro-4-hydroxy-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-8-carboxylic acid methyl ester (48 g, quant.) as a light yellow oil which was used for next step without further purification: LC/MS m/e calcd for C19H19BrClNO3 (M+H)+: 425.73, observed: 405.9 & 407.9.

後処理

  1. concentrationThen the reaction mixture was concentrated in vacuo
  2. extractionthe residue was extracted with ethyl acetate (2×200 mL)
  3. washwashed with brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-c9475f9e8b6b4529a2fc9611cb184b76
出典データセット
uspto-grants-2013_01
特許番号
US08344137B2

関連ノート

読み込み中…