Dimethylformamide → tert-Butyl [(1S)-2-[3-bromo-4-(2-tert-butyl-1,1-dioxido-3-oxo-2,3-dihydroisothiazol-5-yl)phenyl]-1-(5-phenyl-1-[2-(trimethylsilyl)ethoxy]methyl-1H-imidazol-2-yl)ethyl]carbamate

HRID 724726Notes

Reaction equation

HRID 724726 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([CH2:9][C@H:10]([NH:30][C:31](=[O:37])[O:32][C:33]([CH3:36])([CH3:35])[CH3:34])[C:11]2[N:12]([CH2:22][O:23][CH2:24][CH2:25][Si:26]([CH3:29])([CH3:28])[CH3:27])[C:13]([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)=[CH:14][N:15]=2)[CH:5]=[CH:6][C:7]=1I.[C:38]([N:42]1[C:46](=[O:47])[CH:45]=[CH:44][S:43]1(=[O:49])=[O:48])([CH3:41])([CH3:40])[CH3:39].C(N(CC)CC)C.CN(C)C=O>CCCC[N+](CCCC)(CCCC)CCCC.[Cl-].O.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[Br:1][C:2]1[CH:3]=[C:4]([CH2:9][C@H:10]([NH:30][C:31](=[O:37])[O:32][C:33]([CH3:36])([CH3:35])[CH3:34])[C:11]2[N:12]([CH2:22][O:23][CH2:24][CH2:25][Si:26]([CH3:29])([CH3:28])[CH3:27])[C:13]([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=3)=[CH:14][N:15]=2)[CH:5]=[CH:6][C:7]=1[C:44]1[S:43](=[O:48])(=[O:49])[N:42]([C:38]([CH3:40])([CH3:39])[CH3:41])[C:46](=[O:47])[CH:45]=1

Participants

8

Reactant 4

HCID 6228DimethylformamideHCID 8471TriethylamineHCID 111168162-Tert-butyl-2,3-dihydro-1lambda6,2-thiazole-1,1,3-trioneHCID 58746876tert-Butyl [(1S)-2-(3-bromo-4-iodophenyl)-1-(5-phenyl-1-[2-(trimethylsilyl)ethoxy]methyl-1H-imidazol-2-yl)ethyl]carbamate

Product 1

HCID 58746634tert-Butyl [(1S)-2-[3-bromo-4-(2-tert-butyl-1,1-dioxido-3-oxo-2,3-dihydroisothiazol-5-yl)phenyl]-1-(5-phenyl-1-[2-(trimethylsilyl)ethoxy]methyl-1H-imidazol-2-yl)ethyl]carbamateYield 24%

Reagents, catalysts & solvents 3

HCID 70681Tetrabutylammonium ChlorideCatalystHCID 167845palladium(II) acetateCatalystHCID 962WaterSolvent

Conditions

Temperature
70 °C

Procedure

A solution of tert-butyl [(1S)-2-(3-bromo-4-iodophenyl)-1-(5-phenyl-1-[2-(trimethylsilyl)ethoxy]methyl-1H-imidazol-2-yl)ethyl]carbamate (130 mg, 112 μmol), 2-tert-butylisothiazol-3(2H)-one 1,1-dioxide (42.3 mg, 223 μmol), triethylamine (46.7 mL, 335 μmol), palladium acetate (25.1 mg, 112 μmol), N,N-dimethylformamide (3.0 mL) and tetra-N-butylammonium chloride (31.0 mg, 112 μmol) was degassed and stirred at 70° C. for 2 h. The reaction was diluted with water and extracted with ethyl acetate three times, dried with sodium sulfate, filtered, and concentrated in vacuo. The crude residue was purified by flash column chromatography to yield the desired product (20.0 mg, 24%). MF=C35H47BrN4O6SSi; LCMS found for C35H48BrN4O6SSi (M+H)+: m/z=759.

Workup

  1. extractionextracted with ethyl acetate three times
  2. dry with materialdried with sodium sulfate
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customThe crude residue was purified by flash column chromatography

Sources & evidence

ORD record
ord-99929a71af1c46a59075e03f2864b502
Source dataset
uspto-grants-2006_11
Patent number
US07141596B2

Reaction notes

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