反応 #1857567

反応方程式

N-chlorosuccinimide

tert-butyl 4-{4-[(hydroxyimino)methyl]-1,3-thiazol-2-yl}piperidine-1-carboxylate

2-vinylphenol

potassium hydrogencarbonate

→

tert-Butyl 4-{4-[5-(2-hydroxyphenyl)-4,5-dihydro-1,2-oxazol-3-yl]-1,3-thiazol-2-yl}piperidine-1-carboxylate

溶媒

ethyl acetate

ethyl acetate

water

反応条件

後処理

1. 1
   抽出extracted with ethyl acetate
2. 2
   乾燥The organic extracts were dried over sodium sulphate
3. 3
   濃縮concentrated under reduced pressure
4. 4
   その他The residue was purified by chromatography

実験手順

To a solution of tert-butyl 4-{4-[(hydroxyimino)methyl]-1,3-thiazol-2-yl}piperidine-1-carboxylate (3.46 g) and 2-vinylphenol (1.60 g) in ethyl acetate (50 ml) were added, at room temperature, potassium hydrogencarbonate (5.55 g) and N-chlorosuccinimide (1.78 g), and then one drop of water. After stirring at 60° C. overnight, the reaction mixture was admixed with ethyl acetate and water and extracted with ethyl acetate. The organic extracts were dried over sodium sulphate and concentrated under reduced pressure. The residue was purified by chromatography. This gave tert-butyl 4-{4-[5-(2-hydroxyphenyl)-4,5-dihydro-1,2-oxazol-3-yl]-1,3-thiazol-2-yl}piperidine-1-carboxylate (1.70 g).

出典