Dimethyl Sulfoxide → 4-cyano-N,N,5-trimethyl-7-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6-phenyl-1,3-benzoxazole-2-carboxamide

HRID 17374Notes

Reaction equation

HRID 17374 reaction equation
CS(C)=O.[CH3:5][NH:6][C@H:7]1[CH2:11][CH2:10][NH:9][CH2:8]1.[C:12]([C:14]1[C:19]2[N:20]=[C:21]([C:23]([N:25]([CH3:27])[CH3:26])=[O:24])[O:22][C:18]=2[C:17](F)=[C:16]([C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[C:15]=1[CH3:35])#[N:13].C(N(CC)CC)C>[Cl-].[Na+].O>[C:12]([C:14]1[C:19]2[N:20]=[C:21]([C:23]([N:25]([CH3:27])[CH3:26])=[O:24])[O:22][C:18]=2[C:17]([N:9]2[CH2:10][CH2:11][C@H:7]([NH:6][CH3:5])[CH2:8]2)=[C:16]([C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[C:15]=1[CH3:35])#[N:13]

Participants

6

Reactant 4

HCID 679Dimethyl Sulfoxide2×HCID 8471TriethylamineHCID 10261057(3S)-(-)-3-(Methylamino)pyrrolidineHCID 510423354-Cyano-7-fluoro-N,N,5-trimethyl-6-phenyl-1,3-benzoxazole-2-carboxamide

Product 1

HCID 510397294-cyano-N,N,5-trimethyl-7-[(3S)-3-(methylamino)pyrrolidin-1-yl]-6-phenyl-1,3-benzoxazole-2-carboxamide

Reagents, catalysts & solvents 1

HCID 57417360Sodium chloride; waterSolvent

Procedure

Under nitrogen atmosphere, a dimethyl sulfoxide (3 ml) solution (3S)-3-methylaminopyrrolidine (139 μl, 1.40 mmol) was added at 150° C. to a dimethyl sulfoxide (18 ml) solution of 4-cyano-7-fluoro-N,N,5-trimethyl-6-phenyl-1,3-benzoxazole-2-carboxamide (I-114) (350 mg, 1.08 mmol) and triethylamine (201 μl, 1.30 mmol), followed by stirring at the same temperature for 4 hours. After cooling, saturated brine was added to the reaction liquid, and the reaction liquid was extracted with ethyl acetate. Next, the combined organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was subjected to silica gel column chromatography, and the eluate with chloroform/methanol (4:1, v/v) gave a crude product of the entitled compound as a solid, and the solid was suspended and washed in diisopropyl ether to obtain the entitled compound (147 mg, 34%) as a pale yellow solid.

Workup

  1. temperatureAfter cooling
  2. customthe reaction liquid
  3. extractionwas extracted with ethyl acetate
  4. washNext, the combined organic layer was washed with saturated brine
  5. dry with materialdried over anhydrous magnesium sulfate
  6. filtrationfiltered
  7. concentrationthe filtrate was concentrated under reduced pressure

Sources & evidence

ORD record
ord-7e1296315577407fa8b45f1efcb15cca
Source dataset
uspto-grants-2010_06
Patent number
US07737166B2

Reaction notes

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