反応 #595336

反応方程式

sodium hydroxide

lithium aluminum hydride

4-methylmorpholine

ethyl chloroformate

2-phenyl-5-(trifluoromethyl)-1,3-oxazole-4-carboxylic acid

→

[2-Phenyl-5-(trifluoromethyl)-1,3-oxazol-4-yl]methanol

溶媒

water

THF

THF

反応条件

後処理

1. 1
   workup.STIRRINGThe reaction mixture is stirred overnight
2. 2
   温度to warm to RT
3. 3
   温度The mixture is then once more cooled to 0° C.
4. 4
   workup.STIRRINGThe mixture is then stirred at RT overnight
5. 5
   ろ過After filtration
6. 6
   その他the solvent is removed on a rotary evaporator
7. 7
   その他The residue is used without further purification in the subsequent reaction

実験手順

500 mg (1.94 mmol) of 2-phenyl-5-(trifluoromethyl)-1,3-oxazole-4-carboxylic acid are dissolved in 40 ml of dry THF and cooled to −10° C. 197 mg (1.94 mmol) of 4-methylmorpholine and 211 mg (1.94 mmol) of ethyl chloroformate are added. The reaction solution is stirred at −10° C. for 1 h. 3.9 ml (3.89 mmol) of a 1 M solution of lithium aluminum hydride in THF are then slowly added dropwise. The reaction mixture is stirred overnight and slowly allowed to warm to RT. The mixture is then once more cooled to 0° C., and 0.6 ml of water and 1.2 ml of 1 N aqueous sodium hydroxide solution are added carefully. The mixture is then stirred at RT overnight. After filtration, the solvent is removed on a rotary evaporator. The residue is used without further purification in the subsequent reaction.

出典