Ammonium Chloride → Methyl 5-(2,6-dimethoxyphenyl)-5-(1,1-dimethylethylsulfinamido)pentanoate

HRID 594330

반응식

HRID 594330 반응식
I[C:2]1[C:7]([O:8][CH3:9])=[CH:6][CH:5]=[CH:4][C:3]=1[O:10][CH3:11].[Li]CCCC.[C:17]([S:21]([N:23]=[CH:24][CH2:25][CH2:26][CH2:27][C:28]([O:30][CH3:31])=[O:29])=[O:22])([CH3:20])([CH3:19])[CH3:18].[NH4+].[Cl-]>C1COCC1.O.CCOCC>[CH3:11][O:10][C:3]1[CH:4]=[CH:5][CH:6]=[C:7]([O:8][CH3:9])[C:2]=1[CH:24]([NH:23][S:21]([C:17]([CH3:20])([CH3:19])[CH3:18])=[O:22])[CH2:25][CH2:26][CH2:27][C:28]([O:30][CH3:31])=[O:29]

참가 물질

8

반응물 4

HCID 25517Ammonium ChlorideHCID 113914072-Iodo-1,3-dimethoxybenzeneHCID 74336636Methyl 5-((tert-butylsulfinyl)imino)pentanoateHCID 178418339Butyllithium

생성물 1

HCID 69084590Methyl 5-(2,6-dimethoxyphenyl)-5-(1,1-dimethylethylsulfinamido)pentanoate

시약·촉매·용매 3

HCID 962Water용매HCID 3283Diethyl Ether용매HCID 8028Tetrahydrofuran용매2회

반응 조건

온도
-78 °C

실험 절차

A cooled (−78° C.) yellow solution of commercially available 2-iodo-1,3-dimethoxybenzene (9.930 g; 37.60 mmol) in anh. THF (170 ml), under nitrogen, was treated dropwise with a solution of 1.6 M n-BuLi in hexanes (23.5 ml; 37.60 mmol). The resulting slightly yellow solution was further stirred at −78° C. for 15 min. A yellow solution of methyl 5-((tert-butylsulfinyl)imino)pentanoate (5.850 g; 25.07 mmol) in anh. THF (12 ml) was then added dropwise to the cooled reaction mixture, and stirring at −78° C. was continued for 45 min. The resulting yellow reaction mixture was treated successively with aq. sat. NH4Cl (80 ml), Et2O (250 ml) and water (75 ml). The separated yellow organic layer was then washed with brine (75 ml), dried over anh. MgSO4, filtered, and concentrated to dryness under reduced pressure. Purification by FC (DCM/MeOH=25/1) afforded methyl 5-(2,6-dimethoxyphenyl)-5-(1,1-dimethylethylsulfinamido)pentanoate as a yellow oil. LC-MS (conditions B): tR=0.85 min.; [M+H]+: 372.34 g/mol.

후처리

  1. stirringstirring at −78° C.
  2. waitwas continued for 45 min
  3. washThe separated yellow organic layer was then washed with brine (75 ml)
  4. dry with materialdried over anh. MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated to dryness under reduced pressure
  7. customPurification by FC (DCM/MeOH=25/1)

출처 및 근거

ORD 기록
ord-06ed5221251c4ccea0b7d32c3a507725
출처 데이터셋
uspto-grants-2016_01
특허 번호
US09242970B2

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