Potassium Acetate → (S)-tert-Butyl 4-(1-cyano-2-(4-(2-oxo-2,3-dihydrobenzo[d]oxazol-5-yl)phenyl)ethylcarbamoyl)tetrahydro-2H-pyran-4-ylcarbamate

HRID 216985Notes

Reaction equation

HRID 216985 reaction equation
[C:1]([C@@H:3]([NH:12][C:13]([C:15]1([NH:21][C:22](=[O:28])[O:23][C:24]([CH3:27])([CH3:26])[CH3:25])[CH2:20][CH2:19][O:18][CH2:17][CH2:16]1)=[O:14])[CH2:4][C:5]1[CH:10]=[CH:9][C:8](I)=[CH:7][CH:6]=1)#[N:2].C([O-])(=O)C.[K+].CC1(C)C(C)(C)OB([C:42]2[CH:43]=[CH:44][C:45]3[O:49][C:48](=[O:50])[NH:47][C:46]=3[CH:51]=2)O1>C(#N)C.O>[C:1]([C@@H:3]([NH:12][C:13]([C:15]1([NH:21][C:22](=[O:28])[O:23][C:24]([CH3:27])([CH3:26])[CH3:25])[CH2:20][CH2:19][O:18][CH2:17][CH2:16]1)=[O:14])[CH2:4][C:5]1[CH:10]=[CH:9][C:8]([C:42]2[CH:43]=[CH:44][C:45]3[O:49][C:48](=[O:50])[NH:47][C:46]=3[CH:51]=2)=[CH:7][CH:6]=1)#[N:2]

Participants

6

Reactant 3

HCID 517044Potassium AcetateHCID 595685505-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-1,3-benzoxazol-2-oneHCID 59568614(S)-tert-Butyl 4-(1-cyano-2-(4-iodophenyl)ethylcarbamoyl)tetrahydro-2H-pyran-4-ylcarbamate

Product 1

HCID 59568584(S)-tert-Butyl 4-(1-cyano-2-(4-(2-oxo-2,3-dihydrobenzo[d]oxazol-5-yl)phenyl)ethylcarbamoyl)tetrahydro-2H-pyran-4-ylcarbamateYield 52.6%

Reagents, catalysts & solvents 2

HCID 962WaterSolvent2×HCID 6342AcetonitrileSolvent

Conditions

Temperature
90 °C

Procedure

(S)-tert-Butyl 4-(1-cyano-2-(4-iodophenyl)ethylcarbamoyl)tetrahydro-2H-pyran-4-ylcarbamate (Example 15, step (i), 300 mg), potassium acetate (177 mg) and 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]oxazol-2(3H)-one (Example 33, step (i), 157 mg) in a mixture of acetonitrile (25 mL) and water (10 mL) under a nitrogen atmosphere, was treated with 1,1 bis(di-tert-butylphosphino)ferrocene palladium dichloride (12 mg) and the mixture stirred and heated 90° C. for 18 h. The reaction mixture was cooled to room temperature and diluted with water. The products were extracted into ethyl acetate (2×100 mL) and the combined extracts dried over magnesium sulphate and concentrated to dryness. The residue was purified by chromatography on silica eluting with ethyl acetate to afford the sub-titled compound (160 mg).

Workup

  1. temperatureThe reaction mixture was cooled to room temperature
  2. extractionThe products were extracted into ethyl acetate (2×100 mL)
  3. dry with materialthe combined extracts dried over magnesium sulphate
  4. concentrationconcentrated to dryness
  5. customThe residue was purified by chromatography on silica eluting with ethyl acetate

Sources & evidence

ORD record
ord-290c4a7439714620bc44055984548b9d
Source dataset
uspto-grants-2012_06
Patent number
US08193239B2

Reaction notes

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