Water → (4s,7r)-2-(2-Chloro-4-fluoro-phenyl)-1,7,8,8-tetramethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one

HRID 1437966Notes

Reaction equation

HRID 1437966 reaction equation
[Cl:1][C:2]1[CH:7]=[C:6]([F:8])[CH:5]=[CH:4][C:3]=1[N:9]1[C:17](=[O:18])[C:16]2[C@@H:15]3[C:19]([CH3:21])([CH3:20])[C@@:12]([CH3:22])([CH2:13][CH2:14]3)[C:11]=2[NH:10]1.I[CH3:24].O>CN(C)C=O>[Cl:1][C:2]1[CH:7]=[C:6]([F:8])[CH:5]=[CH:4][C:3]=1[N:9]1[C:17](=[O:18])[C:16]2[C@@H:15]3[C:19]([CH3:21])([CH3:20])[C@@:12]([CH3:22])([CH2:13][CH2:14]3)[C:11]=2[N:10]1[CH3:24]

Participants

5

Reactant 3

HCID 962WaterHCID 6328Methyl iodideHCID 57941321(4s,7r)-2-(2-Chloro-4-fluoro-phenyl)-7,8,8-trimethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one2×

Product 1

HCID 57941409(4s,7r)-2-(2-Chloro-4-fluoro-phenyl)-1,7,8,8-tetramethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-oneYield 86.3%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
100 °C

Procedure

A mixture of (4S,7R)-2-(2-chloro-4-fluoro-phenyl)-7,8,8-trimethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (Intermediate 21; 290 mg, 0.90 mmol) and iodomethane (0.15 mL, 2.3 mmol) in N,N-dimethylformamide (5 mL) was heated at 100° C. overnight. Water was added and the reaction mixture was extracted three times with ethyl acetate. The combined organic extracts were washed with water and brine, dried (magnesium sulfate), filtered, and evaporated to give (4S,7R)-2-(2-chloro-4-fluoro-phenyl)-1,7,8,8-tetramethyl-1,2,4,5,6,7-hexahydro-4,7-methano-indazol-3-one (260 mg, 86%) as a yellow solid. ES(+)-MS (M+H) 335.

Workup

  1. extractionthe reaction mixture was extracted three times with ethyl acetate
  2. washThe combined organic extracts were washed with water and brine
  3. dry with materialdried (magnesium sulfate)
  4. filtrationfiltered
  5. customevaporated

Sources & evidence

ORD record
ord-3be023530cbd44698a41e578922ff8f3
Source dataset
uspto-grants-2009_11
Patent number
US07622492B2

Reaction notes

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