Hydrochloric Acid → (3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-3-((5-oxo-4,5-dihydro-1H-1,2,4-triazol-3-yl)methyl)-1-(pentan-3-yl)piperidin-2-one

HRID 931972Notes

Reaction equation

HRID 931972 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C@@H:8]2[C@@H:13]([C:14]3[CH:19]=[CH:18][C:17]([Cl:20])=[CH:16][CH:15]=3)[N:12]([CH:21]([CH2:24][CH3:25])[CH2:22][CH3:23])[C:11](=[O:26])[C@:10]([CH2:28][C:29]([NH:31][NH:32][C:33]([NH2:35])=[O:34])=O)([CH3:27])[CH2:9]2)[CH:5]=[CH:6][CH:7]=1.Cl>[OH-].[Na+]>[Cl:1][C:2]1[CH:3]=[C:4]([C@@H:8]2[C@@H:13]([C:14]3[CH:19]=[CH:18][C:17]([Cl:20])=[CH:16][CH:15]=3)[N:12]([CH:21]([CH2:24][CH3:25])[CH2:22][CH3:23])[C:11](=[O:26])[C@@:10]([CH3:27])([CH2:28][C:29]3[NH:35][C:33](=[O:34])[NH:32][N:31]=3)[CH2:9]2)[CH:5]=[CH:6][CH:7]=1

Participants

4

Reactant 2

HCID 313Hydrochloric AcidHCID 679988332-(2-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-2-oxo-1-(pentan-3-yl)piperidin-3-yl)acetyl)hydrazinecarboxamide

Product 1

HCID 136172811(3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-3-((5-oxo-4,5-dihydro-1H-1,2,4-triazol-3-yl)methyl)-1-(pentan-3-yl)piperidin-2-one

Reagents, catalysts & solvents 1

HCID 14798Sodium HydroxideSolvent

Procedure

259 mg (0.50 mmol) of 2-(2-((3R,5R,6S)-5-(3-Chlorophenyl)-6-(4-chlorophenyl)-3-methyl-2-oxo-1-(pentan-3-yl)piperidin-3-yl)acetyl)hydrazinecarboxamide (Example 76, Step A) was suspended in 2 N aqueous sodium hydroxide (16 mL) and heated at reflux for 3.25 h. Upon cooling to room temperature, the mixture was acidified with conc. HCl until strongly acidic and then extracted with EtOAc (3×). The combined organic layers were dried over Na2SO4, filtered and the filtrate was concentrated. Purification of the residue by reversed phase prep. HPLC (Sunfire™ Prep C18 OBD 10 μm column (Waters, Milford, Mass.), gradient elution of 40% MeCN in water to 75% MeCN in water over a 30 min period, where both solvents contain 0.1% TFA) provided the title compound as a white solid.

Workup

  1. temperatureheated
  2. temperatureat reflux for 3.25 h
  3. extractionthen extracted with EtOAc (3×)
  4. dry with materialThe combined organic layers were dried over Na2SO4
  5. filtrationfiltered
  6. concentrationthe filtrate was concentrated
  7. customPurification of the residue by reversed phase prep
  8. washHPLC (Sunfire™ Prep C18 OBD 10 μm column (Waters, Milford, Mass.), gradient elution of 40% MeCN in water to 75% MeCN in water over a 30 min period, where both solvents

Sources & evidence

ORD record
ord-e4f81c23f2924f74a1bde40779efeeda
Source dataset
uspto-grants-2016_03
Patent number
US09296736B2

Reaction notes

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