tert-Butyl N-allyl-N-[2-(methoxy(methyl)amino)-2-oxo-ethyl]carbamate → tert-Butyl N-allyl-N-[2-oxo-2-(2-thienyl)ethyl]carbamate

HRID 338079ノート

反応式

HRID 338079 の反応式
[CH2:1]([N:4]([CH2:12][C:13](N(OC)C)=[O:14])[C:5](=[O:11])[O:6][C:7]([CH3:10])([CH3:9])[CH3:8])[CH:2]=[CH2:3].[S:19]1[CH:23]=[CH:22][CH:21]=[C:20]1[Li]>O1CCCC1>[CH2:1]([N:4]([CH2:12][C:13](=[O:14])[C:20]1[S:19][CH:23]=[CH:22][CH:21]=1)[C:5](=[O:11])[O:6][C:7]([CH3:8])([CH3:9])[CH3:10])[CH:2]=[CH2:3]

参加物

4

反応物 2

HCID 86697892tert-Butyl N-allyl-N-[2-(methoxy(methyl)amino)-2-oxo-ethyl]carbamateHCID 178418439HCID 178418439、化合物

生成物 1

HCID 86697895tert-Butyl N-allyl-N-[2-oxo-2-(2-thienyl)ethyl]carbamate収率 56%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

実験手順

To a solution of tert-butyl N-allyl-N-[2-(methoxy(methyl)amino)-2-oxo-ethyl]carbamate (25 g, 96.8 mmol) in tetrahydrofuran (339 mL) at −78° C. is added drop wise 2-thienyllithium (145 ml, 1 M in tetrahydrofuran) over 20 min. The reaction is carefully quenched with aqueous ammonium chloride (20 mL), diluted with water (100 mL), and extracted with dichloromethane. The organic layers are combined, dried over sodium sulfate, filtered, and concentrated to give a residue. The residue is purified by silica gel flash chromatography, eluting with hexane/ethyl acetate (1:0) to hexane/ethyl acetate (5:1) to give the title compound (15.2 g, 56%). ES/MS (m/e): 182 (M+H-100).

後処理

  1. customThe reaction is carefully quenched with aqueous ammonium chloride (20 mL)
  2. additiondiluted with water (100 mL)
  3. extractionextracted with dichloromethane
  4. dry with materialdried over sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customto give a residue
  8. customThe residue is purified by silica gel flash chromatography
  9. washeluting with hexane/ethyl acetate (1:0) to hexane/ethyl acetate (5:1)

出典と根拠

ORDレコード
ord-f68aa4a492dd4f91b1e8023167a98ad7
出典データセット
uspto-grants-2014_11
特許番号
US08889856B2

反応ノート

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