Hydroxyamine hydrochloride → 1-(4-(2-(5-Amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethanone oxime

HRID 1479663Notes

Reaction equation

HRID 1479663 reaction equation
[NH2:1][C:2]1[C:11]2[N:10]=[CH:9][C:8]([CH2:12][CH2:13][C:14]3[CH:19]=[CH:18][C:17]([C:20](=O)[CH3:21])=[CH:16][CH:15]=3)=[CH:7][C:6]=2[C:5]2[CH:23]=[CH:24][C:25]([CH3:27])=[CH:26][C:4]=2[N:3]=1.Cl.[NH2:29][OH:30]>CC(O)=O.C(O)C.C(OCC)(=O)C.O>[NH2:1][C:2]1[C:11]2[N:10]=[CH:9][C:8]([CH2:12][CH2:13][C:14]3[CH:19]=[CH:18][C:17]([C:20](=[N:29][OH:30])[CH3:21])=[CH:16][CH:15]=3)=[CH:7][C:6]=2[C:5]2[CH:23]=[CH:24][C:25]([CH3:27])=[CH:26][C:4]=2[N:3]=1

Participants

7

Reactant 2

HCID 443297Hydroxyamine hydrochlorideHCID 582136151-(4-(2-(5-Amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethanone

Product 1

HCID 767047491-(4-(2-(5-Amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethanone oxime

Reagents, catalysts & solvents 4

HCID 176Acetic AcidCatalystHCID 702EthanolSolventHCID 962WaterSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of 1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethanone (from Example 171) (1 eq), hydroxylamine hydrochloride (2 eq) and 1 drop of HOAc, dissolved in absolute ethanol (0.028M) was stirred at room temperature for 1.5 hours. The mixture was diluted with ethyl acetate and water. The two phases were separated, and the aqueous layer was extracted twice with ethyl acetate. The combined organic layers were washed with brine, dried over anhydrous MgSO4, and concentrated en vaccuo. The crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO) using 10-80% ethyl acetate in hexane to give 1-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenyl)ethanone oxime as a white solid. 1H NMR (Methanol-d4): δ 8.56 (s, 1H), 8.52 (s, 1H), 8.12 (d, 1H), 7.45 (d, 2H), 7.31 (s, 1H), 7.12 (m, 3H), 4.51 (s, OH), 3.15 (t, 2H), 3.01 (t, 2H), 2.39 (s, 3H), 2.09 (s, 3H). LRMS [M+H]=371.2

Workup

  1. customThe two phases were separated
  2. extractionthe aqueous layer was extracted twice with ethyl acetate
  3. washThe combined organic layers were washed with brine
  4. dry with materialdried over anhydrous MgSO4
  5. concentrationconcentrated en vaccuo
  6. customThe crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO)

Sources & evidence

ORD record
ord-08ca5939b6d247f898ce465ee1ea2b21
Source dataset
uspto-grants-2016_08
Patent number
US09408907B2

Reaction notes

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