Réaction #531883

Équation de réaction

isopropylamine

(2Z)-3-(3-bromo-2-thienyl)-2-cyano-3-{[1-(1,3-thiazol-2-yl)ethyl]amino}acrylic acid

hydroxybenzotriazole

diisopropylethylamine

dicyclohexylcarbodiimide

→

3-(3-bromo-2-thienyl)-2-cyano-N-isopropyl-3-{[1-(1,3-thiazol-2-yl)ethyl]amino}acrylamide

Rendement 45.2%

Solvants

DCM

Conditions de réaction

Traitement

1. 1
   Autrethe solid formed
2. 2
   Autreremoved by filtration
3. 3
   AutreThe solvent was removed under reduced pressure

Mode opératoire

To a solution of (2Z)-3-(3-bromo-2-thienyl)-2-cyano-3-{[1-(1,3-thiazol-2-yl)ethyl]amino}acrylic acid (0.18 g, 0.468 mmol, 1 eq.) in 5 ml of DCM (CH2Cl2) were added isopropylamine (0.083 g, 1.40 mmol, 3 eq.), hydroxybenzotriazole (HOBT) (0.066 g, 0.49 mmol, 1.05 eq.) and diisopropylethylamine (DIPEA) (0.090 g, 0.70 mmol, 1.5 eq.). The reaction was cooled to 0° C. and dicyclohexylcarbodiimide (DCC) (0.101 g, 0.49 mmol, 1.05 eq.) was added. Stirring was allowed overnight and the solid formed removed by filtration. The solvent was removed under reduced pressure and the residual oil submitted to chromatography on silica gel to give 2Z)-3-(3-bromo-2-thienyl)-2-cyano-N-isopropyl-3-{[1-(1,3-thiazol-2-yl)ethyl]amino}acrylamide (0.090 g, 43% yield) as a white solid and a mixture of atropoisomers.

Source