1-Methylpiperazine → HCID 135456038, compound

HRID 1759745Notes

Reaction equation

HRID 1759745 reaction equation
[CH:1]1([C:6]2[N:14]3[C:9]([C:10](=[O:28])[NH:11][C:12]([C:15]4[CH:16]=[C:17]([S:24](Cl)(=[O:26])=[O:25])[CH:18]=[CH:19][C:20]=4[O:21][CH2:22][CH3:23])=[N:13]3)=[C:8]([CH2:29]C)[N:7]=2)[CH2:5][CH2:4][CH2:3][CH2:2]1.[CH3:31][N:32]1[CH2:37][CH2:36][NH:35][CH2:34][CH2:33]1>ClCCl.CN(C)C1C=CN=CC=1>[CH2:22]([O:21][C:20]1[CH:19]=[CH:18][C:17]([S:24]([N:35]2[CH2:36][CH2:37][N:32]([CH3:31])[CH2:33][CH2:34]2)(=[O:25])=[O:26])=[CH:16][C:15]=1[C:12]1[NH:11][C:10](=[O:28])[C:9]2=[C:8]([CH3:29])[N:7]=[C:6]([CH:1]3[CH2:2][CH2:3][CH2:4][CH2:5]3)[N:14]2[N:13]=1)[CH3:23]

Participants

5

Reactant 2

HCID 531671-MethylpiperazineHCID 135552958HCID 135552958, compound

Product 1

HCID 135456038HCID 135456038, compoundYield 85.8%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent2×

Conditions

Temperature
0 °C

Procedure

0.42 g (0.92 mmol) of 3-(7-cyclopentyl-5-ethyl-4-oxo-3,4-dihydroimidazo[5,1-f][1,2,4]triazin-2-yl)-4-ethoxybenzenesulphonyl chloride are dissolved in 15 ml of dichloromethane and cooled to 0° C. After addition of a spatula tip of 4-dimethylaminopyridine, 0.28 g (2.76 mmol) of N-methylpiperazine are added, and the reaction mixture is stirred at room temperature overnight. The mixture is diluted with dichloromethane, the organic phase is washed with ammonium chloride solution and dried over sodium sulphate and the solvent is removed under reduced pressure. Crystallization from ether gives 0.395 g (80%) of a colourless solid.

Workup

  1. additionare added
  2. washthe organic phase is washed with ammonium chloride solution
  3. dry with materialdried over sodium sulphate
  4. customthe solvent is removed under reduced pressure
  5. customCrystallization from ether

Sources & evidence

ORD record
ord-7ed127383ce04bc88f1365ffda6f0ac3
Source dataset
uspto-grants-2005_01
Patent number
US06838459B1

Reaction notes

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