1-(o-Nitrobenzyl)-imidazole-2-carboxaldehyde → 5H-Imidazo(2,1-c)(1,4)benzodiazepine, 10,11-dihydro-

HRID 440736

Reaktionsgleichung

Reaktionsgleichung von HRID 440736
[N+:1]([C:4]1[CH:17]=[CH:16][CH:15]=[CH:14][C:5]=1[CH2:6][N:7]1[CH:11]=[CH:10][N:9]=[C:8]1[CH:12]=O)([O-])=O>C(O)C>[N:9]1[CH:10]=[CH:11][N:7]2[CH2:6][C:5]3[CH:14]=[CH:15][CH:16]=[CH:17][C:4]=3[NH:1][CH2:12][C:8]=12

Komponenten

3

Edukt 1

HCID 127249851-(o-Nitrobenzyl)-imidazole-2-carboxaldehyde

Produkt 1

HCID 30603995H-Imidazo(2,1-c)(1,4)benzodiazepine, 10,11-dihydro-

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

A 5.0 g sample of 1-(o-nitrobenzyl)-imidazole-2-carboxaldehyde is dissolved in 150 ml of hot ethyl alcohol, cooled to room temperature and filtered. To the filtrate is added 0.5 g of 10% Pd/C and the mixture hydrogenated at 48 psi for 4 hours. An additional 0.5 g of 10% Pd/C is added and hydrogenation continued for 25 hours at 65 psi. The mixture is filtered through diatomaceous earth and the cake washed with ethyl acetate. The filtrate is evaporated in vacuo to a residue which is dissolved in methylene chloride, treated with activated carbon, filtered through diatomaceous earth and hexanes added to the filtrate at the boil to give 1.86 g of the desired product as a crystalling solid, m.p. 164°-170° C.

Aufarbeitung

  1. filtrationfiltered
  2. additionTo the filtrate is added 0.5 g of 10% Pd/C
  3. additionAn additional 0.5 g of 10% Pd/C is added
  4. waithydrogenation continued for 25 hours at 65 psi
  5. filtrationThe mixture is filtered through diatomaceous earth
  6. washthe cake washed with ethyl acetate
  7. customThe filtrate is evaporated in vacuo to a residue which
  8. dissolutionis dissolved in methylene chloride
  9. additiontreated with activated carbon
  10. filtrationfiltered through diatomaceous earth and hexanes
  11. additionadded to the filtrate at the boil

Quellen und Nachweise

ORD-Eintrag
ord-c2f14b6f3495411db556178da289c4f2
Quelldatensatz
uspto-grants-1996_05
Patentnummer
US05521173

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