Water → (S)-8-((2-amino-4-methylpentyl)oxy)-9-hydroxy-6-methylbenzo[c][2,7]naphthyridin-5(6H)-one

HRID 1398301Notes

Reaction equation

HRID 1398301 reaction equation
Br[C:2]1[C:17]([O:18][CH2:19][C@@H:20]([NH:25]C(=O)OC(C)(C)C)[CH2:21][CH:22]([CH3:24])[CH3:23])=[CH:16][C:5]2[N:6]([CH3:15])[C:7](=[O:14])[C:8]3[C:13]([C:4]=2[CH:3]=1)=[CH:12][CH:11]=[N:10][CH:9]=3.CCCC[N+](CCCC)(CCCC)CCCC.[OH-].O.CC1C=CC2C(=C([OH:63])C=CC=2)N=1>CS(C)=O.[Cu]I>[NH2:25][C@@H:20]([CH2:21][CH:22]([CH3:23])[CH3:24])[CH2:19][O:18][C:17]1[C:2]([OH:63])=[CH:3][C:4]2[C:13]3[C:8](=[CH:9][N:10]=[CH:11][CH:12]=3)[C:7](=[O:14])[N:6]([CH3:15])[C:5]=2[CH:16]=1

Participants

7

Reactant 4

HCID 962WaterHCID 132242-Methyl-8-hydroxyquinolineHCID 2723671Tetrabutylammonium HydroxideHCID 86710307(S)-tert-butyl (1-((9-bromo-6-methyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)-4-methylpentan-2-yl)carbamate

Product 1

HCID 73213726(S)-8-((2-amino-4-methylpentyl)oxy)-9-hydroxy-6-methylbenzo[c][2,7]naphthyridin-5(6H)-oneYield 55%

Reagents, catalysts & solvents 2

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 679Dimethyl SulfoxideSolvent

Conditions

Temperature
120 °C

Procedure

A mixture of (S)-tert-butyl (1-((9-bromo-6-methyl-5-oxo-5,6-dihydrobenzo[c][2,7]naphthyridin-8-yl)oxy)-4-methylpentan-2-yl)carbamate (0.05 g, 0.099 mmol) (as prepared in Ex. 3, Part A), tetra-N-butylammonium hydroxide. 30H2O (0.463 g, 1.784 mmol) and water (1.5 mL) was added over 0.1 h to a stirred solution of copper(I) iodide (1.89 mg, 9.91 μmol) and 2-methyl 8-quinolinol (3.16 mg, 0.020 mmol) in DMSO (1 mL). The reaction mixture was heated to 120° C. and stirred for 14 h. The resulting mixture was cooled to room temperature. The crude product was purified by reverse phase HPLC (10 mM ammonium acetate) to afford a (S)-8-((2-amino-4-methylpentyl)oxy)-9-hydroxy-6-methylbenzo[c][2,7]naphthyridin-5(6H)-one (0.004 g, 0.011 mmol, 12% yield) as a brown solid. LC/MS (ESI) m/e 342.2 [(M+H)+, calcd for C19H24N3O3, 342.2]; HPLC retention time (method F): tR=1.62 min. HPLC retention time (method B): tR=5.88 min. 1H NMR (400 MHz, CD3OD) δ 9.39 (s, 1H), 8.62 (d, J=6.00 Hz, 1H), 7.96 (d, J=5.60 Hz, 1H), 7.56 (s, 1H), 6.73 (s, 1H), 3.80 (s, 3H), 3.67-3.70 (m, 1H), 3.49-3.59 (m, 2H), 1.81-1.85 (m, 1H), 1.56-1.63 (m, 2H), 1.05 (d, J=6.80 Hz, 3H), 0.98 (d, J=6.80 Hz, 3H).

Workup

  1. customas prepared in Ex
  2. temperatureThe resulting mixture was cooled to room temperature
  3. customThe crude product was purified by reverse phase HPLC (10 mM ammonium acetate)

Sources & evidence

ORD record
ord-5bb5b92574054b2a93a18965e4b05959
Source dataset
uspto-grants-2014_12
Patent number
US08901305B2

Reaction notes

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