Acetonitrile → (R)-4-(8-(4-chlorophenyl)-3-(1-hydroxyethyl)-5-((2-methyl-6-(trifluoromethyl)pyridin-3-yl)methyl)-6-oxo-5,6-dihydro-[1,2,4]triazolo[4,3-b]pyridazin-7-yl)benzonitrile

HRID 1661111Notes

Reaction equation

HRID 1661111 reaction equation
C([O:8][C@H:9]([C:11]1[N:15]2[N:16]([CH2:36][C:37]3[C:38]([CH3:47])=[N:39][C:40]([C:43]([F:46])([F:45])[F:44])=[CH:41][CH:42]=3)[C:17](=[O:35])[C:18]([C:27]3[CH:34]=[CH:33][C:30]([C:31]#[N:32])=[CH:29][CH:28]=3)=[C:19]([C:20]3[CH:25]=[CH:24][C:23]([Cl:26])=[CH:22][CH:21]=3)[C:14]2=[N:13][N:12]=1)[CH3:10])C1C=CC=CC=1.CC#N.[Si](I)(C)(C)C>CCOC(C)=O>[Cl:26][C:23]1[CH:22]=[CH:21][C:20]([C:19]2[C:14]3[N:15]([C:11]([C@H:9]([OH:8])[CH3:10])=[N:12][N:13]=3)[N:16]([CH2:36][C:37]3[C:38]([CH3:47])=[N:39][C:40]([C:43]([F:44])([F:45])[F:46])=[CH:41][CH:42]=3)[C:17](=[O:35])[C:18]=2[C:27]2[CH:28]=[CH:29][C:30]([C:31]#[N:32])=[CH:33][CH:34]=2)=[CH:25][CH:24]=1

Participants

5

Reactant 3

HCID 6342AcetonitrileHCID 85247Trimethylsilyl iodideHCID 67128877(S)-4-(3-(1-(benzyloxy)ethyl)-8-(4-chlorophenyl)-5-((2-methyl-6-(trifluoromethyl)pyridin-3-yl)methyl)-6-oxo-5,6-dihydro-[1,2,4]triazolo[4,3-b]pyridazin-7-yl)benzonitrile

Product 1

HCID 59177924(R)-4-(8-(4-chlorophenyl)-3-(1-hydroxyethyl)-5-((2-methyl-6-(trifluoromethyl)pyridin-3-yl)methyl)-6-oxo-5,6-dihydro-[1,2,4]triazolo[4,3-b]pyridazin-7-yl)benzonitrileYield 31%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Conditions

Temperature
60 °C

Procedure

To a round bottom flask was added (S)-4-(3-(1-(benzyloxy)ethyl)-8-(4-chlorophenyl)-5-((2-methyl-6-(trifluoromethyl)pyridin-3-yl)methyl)-6-oxo-5,6-dihydro-[1,2,4]triazolo[4,3-b]pyridazin-7-yl)benzonitrile (30 mg, 0.0458 mmol), CH3CN (2 ml) and TMSI (244 mg, 1.22 mmol). The reaction was stirred at 60° C. under argon for 4 days. After this time, the reaction mixture was with EtOAc (50 ml). The resulting organic solution was wash with water (20 ml), 10% NaHSO3(20 ml) and saturated NaCl (20 ml). The organic layer was dried over MgSO4, filtered and concentrated. The crude product was purified by silica gel column chromatography (8 g silica gel) eluting with a gradient of 0-80% EtOAc/Hex to give product (R)-4-(8-(4-chlorophenyl)-3-(1-hydroxyethyl)-5-((2-methyl-6-(trifluoromethyl)pyridin-3-yl)methyl)-6-oxo-5,6-dihydro-[1,2,4]triazolo[4,3-b]pyridazin-7-yl)benzonitrile as a white solid (8 mg, 31% yield).

Workup

  1. washThe resulting organic solution was wash with water (20 ml), 10% NaHSO3(20 ml) and saturated NaCl (20 ml)
  2. dry with materialThe organic layer was dried over MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated
  5. customThe crude product was purified by silica gel column chromatography (8 g silica gel)
  6. washeluting with a gradient of 0-80% EtOAc/Hex

Sources & evidence

ORD record
ord-6e53184d59e642c5824a3ed291901fa3
Source dataset
uspto-grants-2011_10
Patent number
US08030306B2

Reaction notes

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