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Lithium Hydroxide → 5(S)-(Boc-Amino)-4(S)-hydroxy-6-cyclohexyl-2(R)-[(2,3,4-trimethoxyphenyl)methyl]hexanoic acid

HRID 1585363
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1585363
[C:1]([NH:8][C@H:9]([C@H:17]1[O:21][C:20](=[O:22])[C@H:19]([CH2:23][C:24]2[CH:29]=[CH:28][C:27]([O:30][CH3:31])=[C:26]([O:32][CH3:33])[C:25]=2[O:34][CH3:35])[CH2:18]1)[CH2:10][CH:11]1[CH2:16][CH2:15][CH2:14][CH2:13][CH2:12]1)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2].[OH-:36].[Li+]>C(COC)OC.O.[Cl-].[NH4+].C(O)(=O)CC(CC(O)=O)(C(O)=O)O>[C:1]([NH:8][C@@H:9]([CH2:10][CH:11]1[CH2:16][CH2:15][CH2:14][CH2:13][CH2:12]1)[C@@H:17]([OH:21])[CH2:18][C@@H:19]([CH2:23][C:24]1[CH:29]=[CH:28][C:27]([O:30][CH3:31])=[C:26]([O:32][CH3:33])[C:25]=1[O:34][CH3:35])[C:20]([OH:36])=[O:22])([O:3][C:4]([CH3:6])([CH3:5])[CH3:7])=[O:2]
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Komponenten

7

Edukt 2

HCID 3939Lithium HydroxideHCID 677093875(S)-[1(S)-(Boc-Amino)-2-cyclohexylethyl]-3(R)-[(2,3,4-trimethoxyphenyl)-methyl]dihydrofuran-2-(3H)-one

Produkt 1

HCID 228763975(S)-(Boc-Amino)-4(S)-hydroxy-6-cyclohexyl-2(R)-[(2,3,4-trimethoxyphenyl)methyl]hexanoic acid

Reagenzien, Katalysatoren, Lösungsmittel 4

HCID 311Citric AcidLösungsmittel
HCID 962
Water
Lösungsmittel
2×
HCID 80711,2-DimethoxyethaneLösungsmittel
HCID 25517Ammonium ChlorideLösungsmittel

Versuchsvorschrift

A solution of 600 mg (1.22 mmol) of 5(S)-[1(S)-(Boc-amino)-2-cyclohexylethyl]-3(R)-[(2,3,4-trimethoxyphenyl)methyl]dihydrofuran-2-(3H)-one in 20 ml of dimethoxyethane and 9.9 ml of water is treated, at RT, with 4.9 ml of a 1M solution of lithium hydroxide in water, and this reaction mixture is stirred for 2 h. It is then transferred to a separating funnel and diluted with 60 ml of sat. ammonium chloride solution and 5 ml of a 10% citric acid solution (both being cold); this mixture is then extracted with ethyl acetate and a little THF. The title compound, which is dried under HV and subjected to further processing without being purified, is obtained after washing the organic phase with (cold) saline and drying it over sodium sulfate. IR(CH2Cl2) inter alia: 3431, 1710, 1602, 1495, 1165 and 1100 cm-1. FAB-MS (M+H)+ =510. HPLC tRet =16.13 min (gradient II).

Aufarbeitung

  1. customIt is then transferred to a separating funnel
  2. extractionthis mixture is then extracted with ethyl acetate
  3. dry with materialThe title compound, which is dried under HV
  4. customwithout being purified
  5. customis obtained
  6. washafter washing the organic phase with (cold) saline
  7. dry with materialdrying it over sodium sulfate
  8. customtRet =16.13 min (gradient II)

Quellen und Nachweise

ORD-Eintrag
ord-ba37e1e07c3d440da7f87ab74f265015
Quelldatensatz
uspto-grants-1999_08
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US05935976

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