反応 #331552

反応方程式

N-isopropyl-2,2-dimethyl-3-oxo-N-[(3R)-piperidin-3-yl]-4-[2-(propionylamino)ethyl]-7-(trifluoromethyl)-3,4-dihydro-2H-1,4-benzoxazine-6-carboxamide hydrochloride

triethylamine

1-chloroethyl chloroformate

→

title compound

1-Chloroethyl (3R)-3-[{[2,2-dimethyl-3-oxo-4-[2-(propionylamino)ethyl]-7-(trifluoromethyl)-3,4-dihydro-2H-1,4-benzoxazin-6-yl]carbonyl}(isopropyl)amino]piperidine-1-carboxylate

溶媒

chloroform

反応条件

後処理

1. 1
   温度cooling
2. 2
   洗浄the reaction solution was washed with water
3. 3
   乾燥a saturated aqueous sodium chloride solution, dried over magnesium sulfate
4. 4
   濃縮the solvent was concentrated

実験手順

To a solution of N-isopropyl-2,2-dimethyl-3-oxo-N-[(3R)-piperidin-3-yl]-4-[2-(propionylamino)ethyl]-7-(trifluoromethyl)-3,4-dihydro-2H-1,4-benzoxazine-6-carboxamide hydrochloride (3.0 g) in chloroform (25 ml) were added successively triethylamine (0.98 ml) and 1-chloroethyl chloroformate (0.63 ml) under ice-cooling, and the mixture was stirred at room temperature overnight. After the reaction was completed, the reaction solution was washed with water and a saturated aqueous sodium chloride solution, dried over magnesium sulfate, and the solvent was concentrated to give the title compound (3.55 g) as white amorphous. The obtained title compound was used in the next reaction without further purification.

出典