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 470207노트

반응식

HRID 470207 반응식
[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]

참가 물질

4

반응물 2

HCID 86697892tert-Butyl N-allyl-N-[2-(methoxy(methyl)amino)-2-oxo-ethyl]carbamateHCID 178418439HCID 178418439, 화합물

생성물 1

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

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

실험 절차

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).

후처리

  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)

출처 및 근거

ORD 기록
ord-ecd3dce53d7d4a58802a8e266dbecc81
출처 데이터셋
uspto-grants-2014_01
특허 번호
US08629270B2

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