Hydrazine hydrate (1:1) → 3-((2-(4-Chlorophenyl)imidazo[1,2-a]pyridin-3-yl)methyl)-1,2,4-oxadiazole-5-carbohydrazide

HRID 455135Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 455135
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:9]=[C:10]3[CH:15]=[CH:14][CH:13]=[CH:12][N:11]3[C:16]=2[CH2:17][C:18]2[N:22]=[C:21]([C:23]([O:25]CC)=O)[O:20][N:19]=2)=[CH:4][CH:3]=1.[NH2:28][NH2:29].O>CO>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[N:9]=[C:10]3[CH:15]=[CH:14][CH:13]=[CH:12][N:11]3[C:16]=2[CH2:17][C:18]2[N:22]=[C:21]([C:23]([NH:28][NH2:29])=[O:25])[O:20][N:19]=2)=[CH:6][CH:7]=1

Komponenten

4

Edukt 2

HCID 24654Hydrazine hydrate (1:1)HCID 67028744HCID 67028744, Verbindung

Produkt 1

HCID 670286833-((2-(4-Chlorophenyl)imidazo[1,2-a]pyridin-3-yl)methyl)-1,2,4-oxadiazole-5-carbohydrazideAusbeute 86 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel

Versuchsvorschrift

To a solution of ethyl 3-((2-(4-chlorophenyl)imidazo[1,2-a]pyridin-3-yl)methyl)-1,2,4-oxadiazole-5-carboxylate (10.5 mmol, 4.0 g) in MeOH (50 mL) was cooled to 0° C., and 99% NH2NH2.H2O (62.8 mmol, 3.2 g) was then added dropwise. In the period of addition, lots of white precipitate was generated, kept stirring for 15 mins, the white solid was collected by filtration. The white solid was dispersed into MeOH again, sonicated for 10 mins, filtered, to give the final product (3.3 g, 86.0%). m/e+=369 (M+H+). 1H NMR (400 MHz, in DMSO-d6): δ 10.9-10.5 (1H, D, brd, NH), δ 8.44-8.42 (1H, D, d, J=6.8 Hz, ArH), δ 7.87-7.85 (2H, D, dd, J=6.4, 1.6 Hz, ArH), δ 7.67-7.64 (1H, D, d, J=9.2 Hz, ArH), δ 7.56-7.54 (2H, D, dd, J=6.4, 1.6 Hz, ArH), δ 7.38-7.25 (1H, D, m, ArH), δ 5.01-4.75 (2H, D, brd, NH2), δ 4.75 (2H, D, s, CH2).

Aufarbeitung

  1. additionIn the period of addition, lots of white precipitate
  2. filtrationthe white solid was collected by filtration
  3. additionThe white solid was dispersed into MeOH again
  4. customsonicated for 10 mins
  5. filtrationfiltered

Quellen und Nachweise

ORD-Eintrag
ord-cde0f97ea2ef4c39b9ded6308c240bbd
Quelldatensatz
uspto-grants-2013_07
Patentnummer
US08497278B2

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