Hydroxylamine HCl → tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(5-(1-(hydroxyimino)propyl)-7-methoxy-2-oxoquinolin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate

HRID 2193294Notes

Reaction equation

HRID 2193294 reaction equation
[C:1]([O:5][C:6](=[O:44])[N:7]([CH2:33][C:34]1[CH:43]=[CH:42][C:37]2[O:38][CH2:39][CH2:40][O:41][C:36]=2[CH:35]=1)[CH:8]1[CH2:13][CH2:12][N:11]([CH2:14][CH2:15][N:16]2[C:25]3[C:20](=[C:21]([C:28](=O)[CH2:29][CH3:30])[CH:22]=[C:23]([O:26][CH3:27])[CH:24]=3)[CH:19]=[CH:18][C:17]2=[O:32])[CH2:10][CH2:9]1)([CH3:4])([CH3:3])[CH3:2].[Cl-].[OH:46][NH3+:47].C(=O)([O-])O.[Na+]>CO>[C:1]([O:5][C:6](=[O:44])[N:7]([CH2:33][C:34]1[CH:43]=[CH:42][C:37]2[O:38][CH2:39][CH2:40][O:41][C:36]=2[CH:35]=1)[CH:8]1[CH2:9][CH2:10][N:11]([CH2:14][CH2:15][N:16]2[C:25]3[C:20](=[C:21]([C:28](=[N:47][OH:46])[CH2:29][CH3:30])[CH:22]=[C:23]([O:26][CH3:27])[CH:24]=3)[CH:19]=[CH:18][C:17]2=[O:32])[CH2:12][CH2:13]1)([CH3:2])([CH3:4])[CH3:3]

Participants

5

Reactant 3

HCID 21645Hydroxylamine HClHCID 516892Sodium BicarbonateHCID 59398377tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(7-methoxy-2-oxo-5-propionylquinolin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate

Product 1

HCID 72288052tert-butyl (2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(5-(1-(hydroxyimino)propyl)-7-methoxy-2-oxoquinolin-1(2H)-yl)ethyl)piperidin-4-yl)carbamateYield 97.6%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To 2 mL of a methanol solution containing 84 mg of tert-butyl(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(7-methoxy-2-oxo-5-propionylquinolin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate, 40 mg of hydroxylammonium chloride was added, and stirred at room temperature for 9.5 hours. To the reaction mixture, aqueous saturated sodium hydrogen carbonate solution was added. The organic layer was separated, 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; Kanto Chemical Co., Inc., Silica Gel 60N, eluent; chloroform:methanol=20:1], to give 84 mg of tert-butyl(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)(1-(2-(5-(1-(hydroxyimino)propyl)-7-methoxy-2-oxoquinolin-1(2H)-yl)ethyl)piperidin-4-yl)carbamate as a colorless oil.

Workup

  1. additionwas added
  2. customThe organic layer was separated
  3. dry with materialdried over anhydrous magnesium sulfate
  4. customthe solvent was removed under reduced pressure
  5. customThe residue thus obtained
  6. customwas purified by silica gel column chromatography [Silica Gel; Kanto Chemical Co., Inc., Silica Gel 60N, eluent; chloroform:methanol=20:1]

Sources & evidence

ORD record
ord-38523db5fe9f49d8a81449fe26a6dca5
Source dataset
uspto-grants-2012_12
Patent number
US08329694B2

Reaction notes

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