8-Nitrobenzo[f][1,7]naphthyridin-5-amine → Benzo[f][1,7]naphthyridine-5,8-diamine

HRID 340314Notes

Reaction equation

HRID 340314 reaction equation
[N+:1]([C:4]1[CH:18]=[CH:17][C:7]2=[C:8]3[C:13](=[C:14]([NH2:16])[N:15]=[C:6]2[CH:5]=1)[N:12]=[CH:11][CH:10]=[CH:9]3)([O-])=O>CCO.C(Cl)Cl.[Pd]>[CH:9]1[C:8]2[C:13](=[C:14]([NH2:16])[N:15]=[C:6]3[CH:5]=[C:4]([NH2:1])[CH:18]=[CH:17][C:7]3=2)[N:12]=[CH:11][CH:10]=1

Participants

5

Reactant 1

HCID 668916908-Nitrobenzo[f][1,7]naphthyridin-5-amine

Product 1

HCID 58213735Benzo[f][1,7]naphthyridine-5,8-diamine

Reagents, catalysts & solvents 3

HCID 23938PalladiumCatalystHCID 702EthanolSolventHCID 6344DichloromethaneSolvent

Procedure

A mixture of 8-nitrobenzo[f][1,7]naphthyridin-5-amine (from the previous step) (1.0 eq) and Pd/C (wet, 10% wt) in EtOH was stiffed under H2 balloon overnight. The reaction mixture was diluted with DCM. The insoluble solid was filtered off through celite, and the filtrate was concentrated en vacuo to obtain a crude residue. The crude material was washed with acetone to give benzo[f][1,7]naphthyridine-5,8-diamine as an off white solid: 1H NMR (methanol-d4): δ 8.73 (dd, 1H), 8.71 (dd, 1H), 8.11 (d, 1H), 7.69 (dd, 1H), 6.86 (d, 1H), 6.82 (dd, 1H). LRMS [M+H]=211.1.

Workup

  1. customballoon overnight
  2. filtrationThe insoluble solid was filtered off through celite
  3. concentrationthe filtrate was concentrated en vacuo
  4. customto obtain a crude residue
  5. washThe crude material was washed with acetone

Sources & evidence

ORD record
ord-d19d90436a954b5ea7361dd906348806
Source dataset
uspto-grants-2014_11
Patent number
US08895577B2

Reaction notes

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