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Isoamyl Nitrite → (S)-Diethyl 2-((4-(acetoxymethyl)-7-chloro-1H-indazol-5-yl)methyl)succinate

HRID 132309
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 132309
[N:1](OCCC(C)C)=O.[CH2:9]([O:11][C:12](=[O:35])[C@@H:13]([CH2:20][C:21]1[CH:26]=[C:25]([Cl:27])[C:24]([NH2:28])=[C:23]([CH3:29])[C:22]=1[CH2:30][O:31][C:32](=[O:34])[CH3:33])[CH2:14][C:15]([O:17][CH2:18][CH3:19])=[O:16])[CH3:10].C([O-])(=O)C.[K+]>C(O)(=O)C>[CH2:9]([O:11][C:12](=[O:35])[C@@H:13]([CH2:20][C:21]1[C:22]([CH2:30][O:31][C:32](=[O:34])[CH3:33])=[C:23]2[C:24](=[C:25]([Cl:27])[CH:26]=1)[NH:28][N:1]=[CH:29]2)[CH2:14][C:15]([O:17][CH2:18][CH3:19])=[O:16])[CH3:10]
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

5

Edukt 3

HCID 8053Isoamyl NitriteHCID 517044Potassium AcetateHCID 597319572-(S)-(2-Acetoxymethyl-4-amino-5-chloro-3-methyl-benzyl)-succinic acid diethyl ester

Produkt 1

HCID 59731976(S)-Diethyl 2-((4-(acetoxymethyl)-7-chloro-1H-indazol-5-yl)methyl)succinateAusbeute 80 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 176
Acetic Acid
Lösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

Isoamyl nitrite (700 μL, 5.2 mmol), was added dropwise to an ice cold solution of 2-(S)-(2-Acetoxymethyl-4-amino-5-chloro-3-methyl-benzyl)-succinic acid diethyl ester (1.91 g, 4.8 mmol) in 5% acetic acid in tolune (81.2 mL). Mixture stirred at 0° C. for 45 minutes. Potassium acetate (1.50 g, 15.3 mmol) was added to the mixture. Reaction was stirred at room temperature for 14 hours. Mixture was quenched with water. Mixture was extracted with ethyl acetate (30 mL). Mixture was washed 2× saturated aqueous sodium bicarbonate. Organic was dried (magnesium sulfate) filtered and concentrated. Silica gel chromatography (ethyl acetate-hexanes) afforded the desired product in 80% yield as an amber oil. 1H NMR (300 MHz, CDCl3): δ=8.23 (s, 1H), 7.26 (s, 1H), 5.45 (s, 2H), 4.09 (q, J=7.0, 4H), 3.20 (dd, J1=7.32, J2=13.2, 1H), 3.10 (m, 1H), 2.97 (dd, J1=7.0, J2=13.3, 1H), 2.73 (dd, J1=8.4, J2=16.8, 1H), 2.44 (dd, J1=5.5, J2=16.8, 1H), 2.08 (s, 3H), 1.18 (m, 6H). MS m/e (M+H)+=411.0.

Aufarbeitung

  1. customReaction
  2. stirringwas stirred at room temperature for 14 hours
  3. customMixture was quenched with water
  4. extractionMixture was extracted with ethyl acetate (30 mL)
  5. washMixture was washed 2× saturated aqueous sodium bicarbonate
  6. dry with materialOrganic was dried (magnesium sulfate)
  7. filtrationfiltered
  8. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-fb27aae52a7044938903bae91d82f029
Quelldatensatz
uspto-grants-2008_06
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07384931B2

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