1-Tert-butyl-4-isocyanatobenzene → HCID 59454472, compound

HRID 1097473Notes

Reaction equation

HRID 1097473 reaction equation
[NH2:1][C:2]1[CH:3]=[C:4]([CH:21]=[CH:22][CH:23]=1)[O:5][C:6]1[CH:18]=[CH:17][C:9]2[N:10]=[C:11]([NH:13][C:14](=[O:16])[CH3:15])[S:12][C:8]=2[C:7]=1[C:19]#[N:20].[N:24]([C:27]1[CH:32]=[CH:31][C:30]([C:33]([CH3:36])([CH3:35])[CH3:34])=[CH:29][CH:28]=1)=[C:25]=[O:26]>CN(C)C=O.C(OCC)(=O)C>[C:33]([C:30]1[CH:31]=[CH:32][C:27]([NH:24][C:25]([NH:1][C:2]2[CH:3]=[C:4]([CH:21]=[CH:22][CH:23]=2)[O:5][C:6]2[CH:18]=[CH:17][C:9]3[N:10]=[C:11]([NH:13][C:14](=[O:16])[CH3:15])[S:12][C:8]=3[C:7]=2[C:19]#[N:20])=[O:26])=[CH:28][CH:29]=1)([CH3:36])([CH3:34])[CH3:35]

Participants

5

Reactant 2

HCID 27356951-Tert-butyl-4-isocyanatobenzeneHCID 86644686N-[6-(3-aminophenoxy)-7-cyano-1,3-benzothiazol-2-yl]acetamide

Product 1

HCID 59454472HCID 59454472, compoundYield 40%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

N-[6-(3-Aminophenoxy)-7-cyano-1,3-benzothiazol-2-yl]acetamide (120 mg, 0.369 mmol) produced in Example 12(ii) was dissolved in N,N-dimethylformamide (1.5 mL), 1-isocyanato-4-(tert-butyl)benzene (85 μL, 0.48 mmol) was added, and the mixture was stirred at room temperature for 12 hr. The reaction mixture was diluted with ethyl acetate (10 mL), washed successively with 5% aqueous sodium hydrogen carbonate solution (5 mL) and saturated brine (5 ml), and dried over anhydrous sodium sulfate. Insoluble material was filtered off, and the filtrate was concentrated under reduced pressure. The obtained residue was purified by basic silica gel column chromatography (ethyl acetate/n-hexane=60/40→100/0), and the obtained solution was concentrated under reduced pressure. The residue was recrystallized from acetone/n-hexane to give the title compound (73 mg, 40%) as a white powder.

Workup

  1. washwashed successively with 5% aqueous sodium hydrogen carbonate solution (5 mL) and saturated brine (5 ml)
  2. dry with materialdried over anhydrous sodium sulfate
  3. filtrationInsoluble material was filtered off
  4. concentrationthe filtrate was concentrated under reduced pressure
  5. customThe obtained residue was purified by basic silica gel column chromatography (ethyl acetate/n-hexane=60/40→100/0)
  6. concentrationthe obtained solution was concentrated under reduced pressure
  7. customThe residue was recrystallized from acetone/n-hexane

Sources & evidence

ORD record
ord-0bfa52de7d67475ba75656148bd00044
Source dataset
uspto-grants-2012_03
Patent number
US08143258B2

Reaction notes

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