反応 #2383789

反応方程式

sodium hydrogencarbonate

tetrabutylammonium fluoride

acetic acid

tetrahydrofuran

tetrahydrofuran

→

(R)-(1-hydroxyethyl)-11-oxo-1-azatricyclo-[7.2.0.03,8]undec-2-ene-2-carboxylate

収率 92.0%

反応条件

後処理

1. 1
   抽出the obtained mixture was extracted with ethyl acetate (3×15 ml)
2. 2
   乾燥dried with sodium sulfate
3. 3
   ろ過the drying agent was filtered off
4. 4
   その他the solvent was evaporated from the filtrate

実験手順

To a solution of allyl (8S,9R,10S)-10-((R)-(1-(tert-butyldimethylsilyl)oxy)ethyl)-11-oxo-1-azatricyclo-[7.2.0.03,8]undec-2-ene-2-carboxylate (405 mg;1 mmole) prepared according to the process disclosed in Example 9a in tetrahydrofuran (10 ml), 1M tetrabutylammonium fluoride solution (3 ml; 3 mmole) in tetrahydrofuran and acetic acid (0.23 ml; 4 mmole) were added. The obtained mixture was stirred for 2 hours at room temperature. Then the solution was shaken with saturated aqueous sodium hydrogencarbonate solution (10 ml) and the obtained mixture was extracted with ethyl acetate (3×15 ml). The organic phases were combined and dried with sodium sulfate, the drying agent was filtered off and the solvent was evaporated from the filtrate. (8S,9R,10S)-10-((R)-(1-hydroxyethyl)-11-oxo-1-azatricyclo-[7.2.0.03,8]undec-2-ene-2-carboxylate (267 mg; 92%) was obtained as a crude product in the form of a yellowish viscous oil.

出典