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Dimethyl Sulfoxide → 2-[2-(Benzyloxy)-1,1-dimethylethyl]-7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-5-methyl-6-phenyl-1,3-benzoxazole-4-carbonitrile

HRID 17318
Notes
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Reaction equation

HRID 17318 reaction equation
C(N(CC)CC)C.[CH3:8][N:9]([CH3:15])[C@H:10]1[CH2:14][CH2:13][NH:12][CH2:11]1.CS(C)=O.[CH2:20]([O:27][CH2:28][C:29]([C:32]1[O:33][C:34]2[C:35](=[C:37]([C:49]#[N:50])[C:38]([CH3:48])=[C:39]([C:42]3[CH:47]=[CH:46][CH:45]=[CH:44][CH:43]=3)[C:40]=2F)[N:36]=1)([CH3:31])[CH3:30])[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1>C(OCC)(=O)C>[CH2:20]([O:27][CH2:28][C:29]([C:32]1[O:33][C:34]2[C:35](=[C:37]([C:49]#[N:50])[C:38]([CH3:48])=[C:39]([C:42]3[CH:47]=[CH:46][CH:45]=[CH:44][CH:43]=3)[C:40]=2[N:12]2[CH2:13][CH2:14][C@H:10]([N:9]([CH3:15])[CH3:8])[CH2:11]2)[N:36]=1)([CH3:31])[CH3:30])[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 679Dimethyl SulfoxideHCID 8471TriethylamineHCID 7019156(3S)-(-)-3-(Dimethylamino)pyrrolidineHCID 685844612-(2-Benzyloxy-1,1-dimethylethyl)-7-fluoro-5-methyl-6-phenyl-1,3-benzoxazole-4-carbonitrile

Product 1

HCID 685860062-[2-(Benzyloxy)-1,1-dimethylethyl]-7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-5-methyl-6-phenyl-1,3-benzoxazole-4-carbonitrile
Yield 91.1%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Conditions

Temperature
90 °C

Procedure

Triethylamine (222 μl, 1.59 mmol), (3S)-3-(dimethylamino)pyrrolidine (152 μl, 1.19 mmol) were added to a dimethyl sulfoxide (16.5 ml) solution of 2-[2-(benzyloxy)-1,1-dimethylethyl]-7-fluoro-5-methyl-6-phenyl-1,3-benzoxazole-4-carbonitrile (I-66) (330 mg, 0.796 mmol), followed by stirring overnight at 90° C. After cooling, the reaction liquid was diluted with ethyl acetate, washed three times with saturated brine, then dried over anhydrous magnesium sulfate, concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (chloroform:methanol=100:1) to obtain the entitled compound (369 mg, 91%) as a pale brown oil.

Workup

  1. temperatureAfter cooling
  2. customthe reaction liquid
  3. washwashed three times with saturated brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe resulting residue was purified by silica gel column chromatography (chloroform:methanol=100:1)

Sources & evidence

ORD record
ord-4bf106d9387a4d12a650fb0b39fbb4e9
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