4-Hydroxybenzoic acid hydrazide → 4-Hydroxy-benzoic acid (4,5-dimethyl-furan-2-ylmethylene)-hydrazide

HRID 1525768

Reaktionsgleichung

Reaktionsgleichung von HRID 1525768
[OH:1][C:2]1[CH:11]=[CH:10][C:5]([C:6]([NH:8][NH2:9])=[O:7])=[CH:4][CH:3]=1.[CH3:12][C:13]1[CH:14]=[C:15]([CH:19]=O)[O:16][C:17]=1[CH3:18]>C(O)(=O)C.CCO>[CH3:12][C:13]1[CH:14]=[C:15]([CH:19]=[N:9][NH:8][C:6](=[O:7])[C:5]2[CH:10]=[CH:11][C:2]([OH:1])=[CH:3][CH:4]=2)[O:16][C:17]=1[CH3:18]

Komponenten

5

Edukt 2

HCID 17424-Hydroxybenzoic acid hydrazideHCID 6434064,5-Dimethyl-2-furaldehyde

Produkt 1

HCID 674443954-Hydroxy-benzoic acid (4,5-dimethyl-furan-2-ylmethylene)-hydrazideAusbeute 91 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 176Acetic AcidKatalysatorHCID 702EthanolLösungsmittel

Versuchsvorschrift

To a solution of 4-hydroxy-benzoic acid hydrazide (0.3 g, 0.002 mol) and 4,5-dimethyl-2-furaldehyde (0.25 g, 0.002 mol) in abs. EtOH (10 mL), was added 1 drop of acetic acid. The reaction mixture was refluxed for 5 hours. The reaction mixture was cooling to room temperature and concentrated to remove solvent. The resulting residue was solidified by EtOAc to give red solid 0.47 g, in 90% yield, mp: 251.4° C. 1H NMR (DMSO-d6) δ 11.46 (s, 1H), 10.09 (s, 1H), 8.18 (s, 1H), 7.79 (d, 2H), 6.86 (d, 2H), 6.69 (s, 1H), 2.27 (s, 3H), 1.96 (s, 3H). 13C NMR (DMSO-d6) δ 163.1, 161.0, 150.3, 147.2, 137.0, 130.0, 124.4, 117.4, 116.9, 115.4, 11.8, 9.9. Anal. Calcd for C14H14N2O3.H2O: C, 60.82; H, 5.11; N, 10.13. Found: C, 60.80; H, 5.03; N, 9.48.

Aufarbeitung

  1. temperatureThe reaction mixture was refluxed for 5 hours
  2. concentrationconcentrated
  3. customto remove solvent

Quellen und Nachweise

ORD-Eintrag
ord-21e551e54a084132bc3fb16d4b4e7679
Quelldatensatz
uspto-grants-2015_07
Patentnummer
US09085550B2

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