Trifluoroacetic acid → 1-(2-(4-((2,3-dihydro-1,4-benzodioxin-6-ylmethyl)amino)piperidin-1-yl)ethyl)-7-fluoroquinoxalin-2(1H)-one

HRID 2193335Notes

Reaction equation

HRID 2193335 reaction equation
C(OC(=O)[N:7]([CH2:28][C:29]1[CH:38]=[CH:37][C:32]2[O:33][CH2:34][CH2:35][O:36][C:31]=2[CH:30]=1)[CH:8]1[CH2:13][CH2:12][N:11]([CH2:14][CH2:15][N:16]2[C:25]3[C:20](=[CH:21][CH:22]=[C:23]([F:26])[CH:24]=3)[N:19]=[CH:18][C:17]2=[O:27])[CH2:10][CH2:9]1)(C)(C)C.FC(F)(F)C(O)=O>C(Cl)(Cl)Cl>[O:33]1[C:32]2[CH:37]=[CH:38][C:29]([CH2:28][NH:7][CH:8]3[CH2:9][CH2:10][N:11]([CH2:14][CH2:15][N:16]4[C:25]5[C:20](=[CH:21][CH:22]=[C:23]([F:26])[CH:24]=5)[N:19]=[CH:18][C:17]4=[O:27])[CH2:12][CH2:13]3)=[CH:30][C:31]=2[O:36][CH2:35][CH2:34]1

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 59397832HCID 59397832, compound

Product 1

HCID 593983231-(2-(4-((2,3-dihydro-1,4-benzodioxin-6-ylmethyl)amino)piperidin-1-yl)ethyl)-7-fluoroquinoxalin-2(1H)-one

Reagents, catalysts & solvents 1

HCID 6212ChloroformSolvent

Procedure

To 3 mL of a chloroform solution containing 631 mg of tert-butyl(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(7-fluoro-2-oxoquinoxalin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate, 3 mL of trifluoroacetic acid was added and stirred at room temperature for 6 hours. After solvents of the reaction mixture were removed under reduced pressure and the residue was alkalized by aqueous saturated sodium hydrogen carbonate solution, it was extracted with ethyl acetate. The organic layer was washed sequentially with water and aqueous saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and the solvent was removed under reduced pressure. The residue thus obtained was purified by silica gel column chromatography [Silica Gel; Fuji Silysia Chemical Ltd., Chromatorex-NH, eluent; chloroform:methanol=5:1], to give 400 mg of (1-(2-(4-((2,3-dihydro-1,4-benzodioxin-6-ylmethyl)amino)piperidin-1-yl)ethyl)-7-fluoroquinoxalin-2(1H)-one as a brown solid.

Workup

  1. additionwas added
  2. customAfter solvents of the reaction mixture were removed under reduced pressure
  3. extractionwas extracted with ethyl acetate
  4. washThe organic layer was washed sequentially with water and aqueous saturated sodium chloride solution
  5. dry with materialdried over anhydrous magnesium sulfate
  6. customthe solvent was removed under reduced pressure
  7. customThe residue thus obtained
  8. customwas purified by silica gel column chromatography [Silica Gel; Fuji Silysia Chemical Ltd., Chromatorex-NH, eluent; chloroform:methanol=5:1]

Sources & evidence

ORD record
ord-b8392a2288de4dd691c38d1db6fadcd3
Source dataset
uspto-grants-2012_12
Patent number
US08329694B2

Reaction notes

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