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Triethylamine → 4-Cyano-7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-N-methoxy-N,5-dimethyl-6-phenyl-1,3-benzoxazole-2-carboxamide

HRID 17377
Notes
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Reaction equation

HRID 17377 reaction equation
[C:1]([C:3]1[C:8]2[N:9]=[C:10]([C:12]([N:14]([O:16][CH3:17])[CH3:15])=[O:13])[O:11][C:7]=2[C:6](F)=[C:5]([C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)[C:4]=1[CH3:25])#[N:2].C(N(CC)CC)C.[CH3:33][N:34]([CH3:40])[C@H:35]1[CH2:39][CH2:38][NH:37][CH2:36]1.C(OCC)(=O)C>CS(C)=O.[Cl-].[Na+].O>[C:1]([C:3]1[C:8]2[N:9]=[C:10]([C:12]([N:14]([O:16][CH3:17])[CH3:15])=[O:13])[O:11][C:7]=2[C:6]([N:37]2[CH2:38][CH2:39][C@H:35]([N:34]([CH3:40])[CH3:33])[CH2:36]2)=[C:5]([C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)[C:4]=1[CH3:25])#[N:2]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 8857Ethyl AcetateHCID 7019156(3S)-(-)-3-(Dimethylamino)pyrrolidineHCID 866308444-Cyano-7-fluoro-N-methoxy-N,5-dimethyl-6-phenyl-1,3-benzoxazole-2-carboxamide

Product 1

HCID 866308434-Cyano-7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-N-methoxy-N,5-dimethyl-6-phenyl-1,3-benzoxazole-2-carboxamideYield 32%

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolvent2×HCID 57417360Sodium chloride; waterSolvent

Conditions

Temperature
150 °C

Procedure

4-Cyano-7-fluoro-N-methoxy-N,5-dimethyl-6-phenyl-1,3-benzoxazole-2-carboxamide (I-115) (200 mg, 0.59 mmol) was dissolved in dimethyl sulfoxide (10 ml), and at room temperature, triethylamine (99 μl, 0.71 mmol) was added. Next, the solution was heated at 150° C., and a solution of (3S)-3-(dimethylamino)pyrrolidine (90 μl, 0.71 mmol) dissolved in dimethyl sulfoxide (2 ml) was added all at a time, followed by further stirring for 1.5 hours. The mixture liquid was cooled to room temperature, then this was fractionated with ethyl acetate and saturated brine. The aqueous layer was separated, this was extracted twice with ethyl acetate. The organic layers were combined, washed with saturated brine, and dried over anhydrous sodium sulfate. The insoluble matter was separated by filtration, the solvent was evaporated away, and the resulting residue was purified by preparative TLC (eluent, chloroform:methanol=94:6) to obtain the entitled compound (81 mg, 32%) as a brown amorphous substance.

Workup

  1. additionwas added all at a time
  2. temperatureThe mixture liquid was cooled to room temperature
  3. customThe aqueous layer was separated
  4. extractionthis was extracted twice with ethyl acetate
  5. washwashed with saturated brine
  6. dry with materialdried over anhydrous sodium sulfate
  7. customThe insoluble matter was separated by filtration
  8. customthe solvent was evaporated away
  9. customthe resulting residue was purified by preparative TLC (eluent, chloroform:methanol=94:6)

Sources & evidence

ORD record
ord-a52a6c40149e41aca560ea978f27c651
Source dataset
uspto-grants-2010_06
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07737166B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes