Reaktion #72255

Reaktionsgleichung

cis(±)-2-(4-{[(4-chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-methoxypiperidin-1-yl)-N-(2-cyanoethyl)-4-methyl-1,3-thiazole-5-carboxylic acid amide

triphenylphosphine

diisopropyl azodicarboxylate

trimethylsilyl azide

→

title compound

Ausbeute 41.0%

cis(±)-4-Chloro-N-(1-{5-[1-(2-cyanoethyl)-1H-tetrazol-5-yl]-4-methyl-1,3-thiazol-2-yl}-3-methoxypiperidin-4-yl)-5-ethyl-1H-imidazole-2-carboxylic acid amide

Ausbeute 41.0%

Lösungsmittel

THF

ethyl acetate

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGby stirring at 30° C. for four days
2. 2
   WaschenThe organic layer was washed with water and brine
3. 3
   Trocknendried over anhydrous magnesium sulfate
4. 4
   Einengenconcentrated under reduced pressure
5. 5
   SonstigeThe residue was purified by silica gel column chromatography (elution solvent: methanol/ethyl acetate=0/10, 2/8) and preparative thin layer chromatography (developing solvent: ethyl acetate/hexane=10/1)

Vorschrift

THF (2 mL) was added to cis(±)-2-(4-{[(4-chloro-5-ethyl-1H-imidazol-2-yl)carbonyl]amino}-3-methoxypiperidin-1-yl)-N-(2-cyanoethyl)-4-methyl-1,3-thiazole-5-carboxylic acid amide obtained in Example (261a) (36 mg, 0.08 mmol). While the mixture was stirred, triphenylphosphine (124 mg, 0.47 mmol), diisopropyl azodicarboxylate (0.24 mL, 0.45 mmol, 1.9 M solution in toluene) and trimethylsilyl azide (7.3 g, 55.4 mmol) were added, followed by stirring at 30° C. for four days. The reaction solution was diluted with ethyl acetate. The organic layer was washed with water and brine, dried over anhydrous magnesium sulfate, and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography (elution solvent: methanol/ethyl acetate=0/10, 2/8) and preparative thin layer chromatography (developing solvent: ethyl acetate/hexane=10/1) to obtain 16 mg of the title compound as a white solid (41%).

Quelle