Trifluoroacetic acid → (3R)-6-cyclohexyl-3-{3-[(2-ethoxy-1-methyl-2-oxoethoxy)methyl]-1,2,4-oxadiazol-5-yl}hexanoic acid

HRID 1279873노트

반응식

HRID 1279873 반응식
[CH:1]1([CH2:7][CH2:8][CH2:9][C@@H:10]([C:19]2[O:23][N:22]=[C:21]([CH2:24][O:25][CH:26]([CH3:32])[C:27]([O:29][CH2:30][CH3:31])=[O:28])[N:20]=2)[CH2:11][C:12]([O:14]C(C)(C)C)=[O:13])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.FC(F)(F)C(O)=O>ClCCl>[CH:1]1([CH2:7][CH2:8][CH2:9][C@@H:10]([C:19]2[O:23][N:22]=[C:21]([CH2:24][O:25][CH:26]([CH3:32])[C:27]([O:29][CH2:30][CH3:31])=[O:28])[N:20]=2)[CH2:11][C:12]([OH:14])=[O:13])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1

참가 물질

4

반응물 2

HCID 6422Trifluoroacetic acidHCID 59909758tert-Butyl (3R)-6-cyclohexyl-3-{3-[(2-ethoxy-1-methyl-2-oxoethoxy)methyl]-1,2,4-oxadiazol-5-yl}hexanoate

생성물 1

HCID 59909830(3R)-6-cyclohexyl-3-{3-[(2-ethoxy-1-methyl-2-oxoethoxy)methyl]-1,2,4-oxadiazol-5-yl}hexanoic acid수율 94%

시약·촉매·용매 1

HCID 6344Dichloromethane용매

실험 절차

A solution of tert-butyl (3R)-6-cyclohexyl-3-{3-[(2-ethoxy-1-methyl-2-oxoethoxy)methyl]-1,2,4-oxadiazol-5-yl}hexanoate (Preparation 88) (480 mg, 1.06 mmol) in dichloromethane (8 ml) was treated with trifluoroacetic acid (3.5 ml) and stirred at room temperature for 5 hours. The solvent was removed under reduced pressure and the residue azeotroped from toluene and dichloromethane. The oil was purified by column chromatography on silica gel eluting with a gradient system of 100:0:0 (dichloromethane:methanol:acetic acid) gradually changing to 95:5:0.5 (dichloromethane:methanol:acetic acid) to afford the title compound as a colourless oil (395 mg).

후처리

  1. customThe solvent was removed under reduced pressure
  2. customthe residue azeotroped from toluene and dichloromethane
  3. customThe oil was purified by column chromatography on silica gel eluting with a gradient system of 100:0:0 (dichloromethane:methanol:acetic acid)

출처 및 근거

ORD 기록
ord-3b07a3f66e8546969638e0d050145ec7
출처 데이터셋
uspto-grants-2002_09
특허 번호
US06448278B2

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