Acetaldehyde → 2-(4-ethylpiperazin-1-yl)-5,7-difluoro-3-methyl-N-(5-morpholinopyridin-3-yl)quinolin-4-amine

HRID 1431657Notes

Reaction equation

HRID 1431657 reaction equation
[F:1][C:2]1[CH:11]=[C:10]([F:12])[CH:9]=[C:8]2[C:3]=1[C:4]([NH:20][C:21]1[CH:22]=[N:23][CH:24]=[C:25]([N:27]3[CH2:32][CH2:31][O:30][CH2:29][CH2:28]3)[CH:26]=1)=[C:5]([CH3:19])[C:6]([N:13]1[CH2:18][CH2:17][NH:16][CH2:15][CH2:14]1)=[N:7]2.[CH:33](=O)[CH3:34].C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C([BH3-])#N.[Na+]>ClC(Cl)C.CO>[CH2:33]([N:16]1[CH2:15][CH2:14][N:13]([C:6]2[C:5]([CH3:19])=[C:4]([NH:20][C:21]3[CH:22]=[N:23][CH:24]=[C:25]([N:27]4[CH2:32][CH2:31][O:30][CH2:29][CH2:28]4)[CH:26]=3)[C:3]3[C:8](=[CH:9][C:10]([F:12])=[CH:11][C:2]=3[F:1])[N:7]=2)[CH2:18][CH2:17]1)[CH3:34]

Participants

7

Reactant 4

HCID 177AcetaldehydeHCID 5003444Sodium cyanoborohydrideHCID 5049666Sodium triacetoxyborohydrideHCID 596310285,7-difluoro-3-methyl-N-(5-morpholinopyridin-3-yl)-2-(piperazin-1-yl)quinolin-4-amine

Product 1

HCID 596312362-(4-ethylpiperazin-1-yl)-5,7-difluoro-3-methyl-N-(5-morpholinopyridin-3-yl)quinolin-4-amine

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 63651,1-DichloroethaneSolvent

Procedure

The 5,7-difluoro-3-methyl-N-(5-morpholinopyridin-3-yl)-2-(piperazin-1-yl)-quinolin-4-amine (50 mg, 0.11 mmol) was dissolved in a mixture of dichloroethane (1.3 mL) and MeOH (0.63 mL). The acetaldehyde (6.4 μL, 0.11 mmol) and sodium triacetoxyborohydride (72 mg, 0.34 mmol) were added and the mixture was stirred overnight. A small amount (50 mg) of sodium cyanoborohydride was added to drive the reaction to completion. The reaction was quenched with satd sodium bicarbonate solution and extracted with EtOAc. The organic layer was then dried over magnesium sulfate and the filtrate was cond. The crude material was purified by reverse-phase preparative HPLC using a Phenomenex Gemini™ column, 10 micron, C18, 100 Å, 150×30 mm, 0.1% TFA in CH3CN/H2O, gradient 10% to 95% over 20 min to provide 2-(4-ethylpiperazin-1-yl)-5,7-difluoro-3-methyl-N-(5-morpholinopyridin-3-yl)quinolin-4-amine. The salt was then free based by eluting through an SCX column with 0 to 2M ammonia in MeOH to give the desired product as the free base. TFA salt: 1H NMR (CDCl3) δ ppm 7.86 (2H, dd, J=4.3, 2.2 Hz), 7.61 (1H, d, J=9.2 Hz), 7.36-7.43 (1H, m), 7.20 (1H, t, J=2.0 Hz), 6.89 (1H, ddd, J=13.4, 8.5, 2.3 Hz), 4.24 (2H, d, J=14.7 Hz), 3.86-3.95 (4H, m), 3.77 (2H, t, J=13.2 Hz), 3.63 (2H, d, J=12.3 Hz), 3.26-3.38 (4H, m), 3.15 (4H, q, J=7.2 Hz), 2.13 (3H, s), 1.39 (3H, t, J=7.3 Hz). Mass Spectrum (ESI) m/e=469.3 (M+1).

Workup

  1. customthe reaction to completion
  2. customThe reaction was quenched with satd sodium bicarbonate solution
  3. extractionextracted with EtOAc
  4. dry with materialThe organic layer was then dried over magnesium sulfate
  5. customThe crude material was purified by reverse-phase preparative HPLC
  6. customover 20 min

Sources & evidence

ORD record
ord-9d183df113694246a3b0065ad4579541
Source dataset
uspto-grants-2015_01
Patent number
US08940724B2

Reaction notes

Loading…