Sodium hydride → Ethyl 5-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenoxy)pentanoate

HRID 340352Notes

Reaction equation

HRID 340352 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]([OH:20])=[CH:16][CH:15]=3)=[CH:7][C:6]=2[C:5]2[CH:21]=[CH:22][C:23]([CH3:25])=[CH:24][C:4]=2[N:3]=1.[H-].[Na+].Br[CH2:29][CH2:30][CH2:31][CH2:32][C:33]([O:35][CH2:36][CH3:37])=[O:34]>CN(C)C=O.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:15]=[CH:16][C:17]([O:20][CH2:29][CH2:30][CH2:31][CH2:32][C:33]([O:35][CH2:36][CH3:37])=[O:34])=[CH:18][CH:19]=3)=[CH:7][C:6]=2[C:5]2[CH:21]=[CH:22][C:23]([CH3:25])=[CH:24][C:4]=2[N:3]=1

Participants

7

Reactant 3

HCID 24758Sodium hydrideHCID 84580Ethyl 5-bromovalerateHCID 582135504-(2-(5-Amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenol

Product 1

HCID 58213647Ethyl 5-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenoxy)pentanoate

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenol (from Example 170) (1.0 equiv.) in dimethylformamide (0.10 M) 22° C. was added 60% dispersion of sodium hydride in mineral oil (1.5 equiv.) and the resulting mixture was allowed to stir for 30 min At this point, ethyl 5-bromopentanoate (1.2 equiv.) was added to this mixture. The reaction mixture was then allowed to stir for 18 hours, after which it was diluted with ethyl acetate and water. The biphasic layers were separated and the organic layer was washed twice with water. The organic layer was dried over anhydrous Na2SO4 and the volatiles were removed in vacuo. The resulting residue was purified by RP-HPLC using a 10-50% MeCN in water gradient. The resulting trifluoroacetate salt was then converted to the free base form by utilizing a StratoSpheres™ PL-SO3H SPE ion exchange resin, delivering ethyl 5-(4-(2-(5-amino-8-methylbenzo[f][1,7]naphthyridin-2-yl)ethyl)phenoxy)pentanoate as a solid. 1H NMR (Acetone-d6): δ 8.80 (s, 1H), 8.74 (s, 1H), 8.33 (d, 1H), 7.47 (s, 1H), 7.24 (d, 1H), 7.17 (d, 2H), 6.85 (d, 2H), 4.10 (q, 2H), 3.97 (t, 2H), 3.25 (t, 2H), 3.07 (t, 2), 2.50 (s, 3H), 2.37 (t, 3H), 1.74-1.84 (m, 4H), 1.21 (t, 3H). LRMS [M+H]=458.2

Workup

  1. additionwas added to this mixture
  2. customThe biphasic layers were separated
  3. washthe organic layer was washed twice with water
  4. dry with materialThe organic layer was dried over anhydrous Na2SO4
  5. customthe volatiles were removed in vacuo
  6. customThe resulting residue was purified by RP-HPLC

Sources & evidence

ORD record
ord-8ae19514729648ed919fa2e85abb7a53
Source dataset
uspto-grants-2014_11
Patent number
US08895577B2

Reaction notes

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