Sodium Nitrite → 4-Hydroxy-2-(4-trifluoromethoxy-benzoylamino)-benzoic acid methyl ester

HRID 29674Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 29674
[CH3:1][O:2][C:3](=[O:25])[C:4]1[CH:9]=[CH:8][C:7](N)=[CH:6][C:5]=1[NH:11][C:12](=[O:24])[C:13]1[CH:18]=[CH:17][C:16]([O:19][C:20]([F:23])([F:22])[F:21])=[CH:15][CH:14]=1.N([O-])=[O:27].[Na+]>FC(F)(F)C(O)=O>[CH3:1][O:2][C:3](=[O:25])[C:4]1[CH:9]=[CH:8][C:7]([OH:27])=[CH:6][C:5]=1[NH:11][C:12](=[O:24])[C:13]1[CH:18]=[CH:17][C:16]([O:19][C:20]([F:23])([F:22])[F:21])=[CH:15][CH:14]=1

Komponenten

4

Edukt 2

HCID 23668193Sodium NitriteHCID 692102524-Amino-2-(4-trifluoromethoxy-benzoylamino)-benzoic acid methyl ester

Produkt 1

HCID 692054424-Hydroxy-2-(4-trifluoromethoxy-benzoylamino)-benzoic acid methyl esterAusbeute 83 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6422Trifluoroacetic acidLösungsmittel

Versuchsvorschrift

This compound was produced using similar methods as those used in Step 3, example 27, starting with 4-amino-2-(4-trifluoromethoxy-benzoylamino)-benzoic acid methyl ester (1.80 g, 5.08 mmol), trifluoroacetic acid (30 mL) and sodium nitrite (0.42 g, 6.15 mmol in 10 mL of water). The crude material was purified by flash chromatography through silica gel using ethyl acetate/hexanes (0/100 gradient to 20/80) to give 4-hydroxy-2-(4-trifluoromethoxy-benzoylamino)-benzoic acid methyl ester (1.49 g, 83%) as a yellow solid. 1H NMR (400 MHz, DMSO-d6); δ 11.98 (s, 1H), 10.62 (s, 1H), 8.21 (d, 1H), 8.06 (d, 2H), 7.90 (d, 1H), 7.61 (d, 2H), 6.61 (dd, 1H), 3.84 (s, 3H).

Aufarbeitung

  1. customThis compound was produced
  2. customThe crude material was purified by flash chromatography through silica gel

Quellen und Nachweise

ORD-Eintrag
ord-cb13d3401329402c8f6b875e3a0243e4
Quelldatensatz
uspto-grants-2008_09
Patentnummer
US07420083B2

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