Sodium Hydroxide → HCID 178444544, Verbindung

HRID 2258043

Reaktionsgleichung

Reaktionsgleichung von HRID 2258043
[CH2:1]([C@H:6]1[CH2:11][CH2:10][C@H:9]([C:12]([OH:14])=O)[CH2:8][CH2:7]1)[CH2:2][CH2:3][CH2:4][CH3:5].C(Cl)(=O)C(Cl)=O.[NH2:21][C@@H:22]([C:26]([OH:28])=[O:27])[C@@H:23]([CH3:25])[OH:24].[OH-].[Na+]>C1(C)C=CC=CC=1.C(#N)C.C1COCC1>[CH2:1]([C@H:6]1[CH2:7][CH2:8][C@H:9]([C:12]([NH:21][C@@H:22]([C:26]([OH:28])=[O:27])[C@@H:23]([CH3:25])[OH:24])=[O:14])[CH2:10][CH2:11]1)[CH2:2][CH2:3][CH2:4][CH3:5]

Komponenten

8

Edukt 4

HCID 14798Sodium HydroxideHCID 65578Oxalyl chlorideHCID 90624D-AllothreonineHCID 178444557HCID 178444557, Verbindung

Produkt 1

HCID 178444544HCID 178444544, Verbindung

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 1140TolueneLösungsmittelHCID 6342AcetonitrileLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

A solution of trans-4-pentylcyclohexane carboxylic acid (198 mg, 1.0 mmol) in dry toluene (1 mL) is treated with oxalyl chloride (760 mg, 5.9 mmol) at 0° C. and the mixture is stirred for 2 h at the same temperature and 1 h at room temperature. Excess reagent is removed in vacuo. A solution of the crude acid chloride in dry acetonitrile (2 mL) is added to a mixture of D-allo-Thr (100 mg, 0.85 mmol), 2N aq. NaOH (600 μl, 1.20 meq) and TEA (85 mg, 0.85 mmol) in THF (1.5 mL), following the procedure described in Example 1. The crude product 2c-6 is purified by chromatography (1.5×18 cm column, 5% CH3OH and 0.4% HOAc in CH2Cl2): NMR δ 0.88 (t, J≃7, 3 H), 4.15 (m, 1 H), 4.54 (m, 1 H), 6.49 (d, 1H); MS (CI, CH4) m/z 300 (M+H).

Aufarbeitung

  1. customExcess reagent is removed in vacuo
  2. customis purified by chromatography (1.5×18 cm column, 5% CH3OH and 0.4% HOAc in CH2Cl2)

Quellen und Nachweise

ORD-Eintrag
ord-946519bf69034902ade0ba75ab6f8b15
Quelldatensatz
uspto-grants-1997_08
Patentnummer
US05658945

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