Cyclohexanol → (5-Cyclohexyloxy-1,3-dioxo-1,3-dihydro-isoindol-2-yl)-acetic acid ethyl ester

HRID 1406112노트

반응식

HRID 1406112 반응식
[CH2:1]([O:3][C:4](=[O:18])[CH2:5][N:6]1[C:14](=[O:15])[C:13]2[C:8](=[CH:9][CH:10]=[C:11]([OH:16])[CH:12]=2)[C:7]1=[O:17])[CH3:2].[CH:19]1(O)[CH2:24][CH2:23][CH2:22][CH2:21][CH2:20]1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>O1CCCC1>[CH2:1]([O:3][C:4](=[O:18])[CH2:5][N:6]1[C:14](=[O:15])[C:13]2[C:8](=[CH:9][CH:10]=[C:11]([O:16][CH:19]3[CH2:24][CH2:23][CH2:22][CH2:21][CH2:20]3)[CH:12]=2)[C:7]1=[O:17])[CH3:2]

참가 물질

5

반응물 3

HCID 7966CyclohexanolHCID 11776TriphenylphosphineHCID 66712563(5-Hydroxy-1,3-dioxo-1,3-dihydro-isoindol-2-yl)-acetic acid ethyl ester

생성물 1

HCID 66712801(5-Cyclohexyloxy-1,3-dioxo-1,3-dihydro-isoindol-2-yl)-acetic acid ethyl ester수율 58.6%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

실험 절차

To a mixture of (5-hydroxy-1,3-dioxo-1,3-dihydro-isoindol-2-yl)-acetic acid ethyl ester (8.0 g) in anhydrous tetrahydrofuran (160 ml) was added cyclohexanol (3.2 g), diethylazadicarboxylate (6.9 g) and then triphenyl phosphine (12.6 g). Resulting mixture was stirred at room temperature overnight and concentrated. Residue was partitioned between water and ethyl acetate. Aqueous layer was extracted with ethyl acetate. Combined organic layers were washed with brine, dried over magnesium sulfate and filtered. Filtrate was concentrated and purified by silica gel chromatography (eluting with 5% ethyl acetate in methylene chloride) to give the title compound (6.2 g). 1H NMR (200 MHz, CDCl3) δ 7.73 (dd, J=8.2, 0.8 Hz, 1 H), 7.30 (br s, 1 H), 7.12 (m, 1 H), 4.38 (m, 3 H), 4.21 (q, J=7.1 Hz, 2 H), 2.02 (m, 2 H), 1.82-1.25 (m, 13 H).

후처리

  1. customResulting mixture
  2. concentrationconcentrated
  3. customResidue was partitioned between water and ethyl acetate
  4. extractionAqueous layer was extracted with ethyl acetate
  5. washCombined organic layers were washed with brine
  6. dry with materialdried over magnesium sulfate
  7. filtrationfiltered
  8. concentrationFiltrate was concentrated
  9. custompurified by silica gel chromatography (eluting with 5% ethyl acetate in methylene chloride)

출처 및 근거

ORD 기록
ord-2281b428da9c497399043ad738b2a4f5
출처 데이터셋
uspto-grants-2014_12
특허 번호
US08916585B2

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