Triethylamine → N-[2-(4-propionylamino-1-piperidinyl)ethyl]-1-(2-propyl)-1H-indazole-3-carboxamide oxalate

HRID 2256367Notes

Reaction equation

HRID 2256367 reaction equation
[C:1]([OH:6])(=[O:5])[C:2]([OH:4])=[O:3].C(O)(=O)C(O)=O.[NH2:13][CH:14]1[CH2:19][CH2:18][N:17]([CH2:20][CH2:21][NH:22][C:23]([C:25]2[C:33]3[C:28](=[CH:29][CH:30]=[CH:31][CH:32]=3)[N:27]([CH:34]([CH3:36])[CH3:35])[N:26]=2)=[O:24])[CH2:16][CH2:15]1.C(N(CC)CC)C.[C:44](Cl)(=[O:47])[CH2:45][CH3:46]>O1CCCC1>[C:1]([OH:6])(=[O:5])[C:2]([OH:4])=[O:3].[C:44]([NH:13][CH:14]1[CH2:15][CH2:16][N:17]([CH2:20][CH2:21][NH:22][C:23]([C:25]2[C:33]3[C:28](=[CH:29][CH:30]=[CH:31][CH:32]=3)[N:27]([CH:34]([CH3:36])[CH3:35])[N:26]=2)=[O:24])[CH2:18][CH2:19]1)(=[O:47])[CH2:45][CH3:46]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 62324Propionyl chlorideHCID 86751129N-[2-(4-amino-1-piperidinyl)ethyl]-1-(2-propyl)-1H-indazole-3-carboxamide dioxalate

Product 1

HCID 18969240N-[2-(4-propionylamino-1-piperidinyl)ethyl]-1-(2-propyl)-1H-indazole-3-carboxamide oxalate

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

The product from Example 23, as the free base (0.310 g, 0.94 mmol) and triethylamine (0.13 mL, 0.94 mmol) were stirred in 10.0 mL tetrahydrofuran and cooled briefly in an ice bath. To the mixture was added dropwise propionyl chloride (0.08 mL, 0.94 mmol) and the resulting mixture was stirred 18 h at room temperature and filtered, and the filtrate was evaporated to an oil. Crystallization as the oxalate salt from ethyl acetate/methanol provided 0.168 g colorless crystals. Mp 169° C. Mass spectrum, m+ =385. Anal (C23H33N5O6) theory C, 58.09; H, 6.99; N, 14.73; found C, 57.79; H, 6.93; N, 14.46.

Workup

  1. temperaturecooled briefly in an ice bath
  2. filtrationfiltered
  3. customthe filtrate was evaporated to an oil
  4. customCrystallization as the oxalate salt from ethyl acetate/methanol

Sources & evidence

ORD record
ord-4adb00e91ad24e6caf3e450e93a7b73a
Source dataset
uspto-grants-1997_08
Patent number
US05654320

Reaction notes

Loading…