2,2-Difluoro-2-(fluorosulfonyl)acetic acid → 4-Difluoromethoxy-pyrrolidine-1,2-dicarboxylic acid 2-[2-(4-bromo-phenyl)-2-oxo-ethyl]ester 1-tert-butyl ester

HRID 71953

反応式

HRID 71953 の反応式
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH:11]([OH:13])[CH2:10][CH:9]1[C:14]([O:16][CH2:17][C:18]([C:20]1[CH:25]=[CH:24][C:23]([Br:26])=[CH:22][CH:21]=1)=[O:19])=[O:15])=[O:7])([CH3:4])([CH3:3])[CH3:2].[F:27][C:28]([F:36])(S(F)(=O)=O)C(O)=O>CC#N.C(OCC)(=O)C>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH:11]([O:13][CH:28]([F:36])[F:27])[CH2:10][CH:9]1[C:14]([O:16][CH2:17][C:18]([C:20]1[CH:25]=[CH:24][C:23]([Br:26])=[CH:22][CH:21]=1)=[O:19])=[O:15])=[O:7])([CH3:4])([CH3:2])[CH3:3]

参加物

5

反応物 2

HCID 27375162,2-Difluoro-2-(fluorosulfonyl)acetic acidHCID 666209004-Hydroxy-pyrrolidine-1,2-dicarboxylic acid 2-[2-(4-bromo-phenyl)-2-oxo-ethyl]ester 1-tert-butyl ester

生成物 1

HCID 666212034-Difluoromethoxy-pyrrolidine-1,2-dicarboxylic acid 2-[2-(4-bromo-phenyl)-2-oxo-ethyl]ester 1-tert-butyl ester収率 61%

試薬・触媒・溶媒 2

HCID 6342Acetonitrile溶媒2 回HCID 8857Ethyl Acetate溶媒

反応条件

温度
45 °C

実験手順

To 4-Hydroxy-pyrrolidine-1,2-dicarboxylic acid 2-[2-(4-bromo-phenyl)-2-oxo-ethyl]ester 1-tert-butyl ester (500 mg) and Cu(I)I (45 mg) in MeCN (8 mL) at 45° C. was added 242 μl of difluoro-fluorosulfonyl-acetic acid in 2 mL of MeCN dropwise for 60 min. The reaction mixture was stirred at 45° C. for 60 min. and evaporated under reduced pressure, and resulting residue was taken up in ethyl acetate (100 mL). The organic phase was washed with brine (1×100 mL) and dried over sodium sulfate. After the solvent was removed, the resulting oil was subjected to silica gel chromatography using effluent of 10-50% ethyl acetate and hexanes. The fractions containing product were combined and the solvent was removed under reduced pressure to provide 4-Difluoromethoxy-pyrrolidine-1,2-dicarboxylic acid 2-[2-(4-bromo-phenyl)-2-oxo-ethyl]ester 1-tert-butyl ester (339 mg, 61%) as a clear oil.

後処理

  1. customevaporated under reduced pressure
  2. customresulting residue
  3. washThe organic phase was washed with brine (1×100 mL)
  4. dry with materialdried over sodium sulfate
  5. customAfter the solvent was removed
  6. additionThe fractions containing product
  7. customthe solvent was removed under reduced pressure

出典と根拠

ORDレコード
ord-bc5a242d17964534b78def3f8b7912f9
出典データセット
uspto-grants-2014_09
特許番号
US08822430B2

関連ノート

読み込み中…