反応 #8192

反応方程式

[2-(7-hydroxy-1H-indol-3-yl)-1,1-dimethyl-ethyl]-carbamic acid tert-butyl ester

bromoacetonitrile

K2CO3

→

[2-(7-cyanomethoxy-1H-indol-3-yl)-1,1-dimethyl-ethyl]-carbamic acid tert-butyl ester

収率 86.5%

溶媒

2-butanone

反応条件

後処理

1. 1
   温度is heated to reflux
2. 2
   温度to cool
3. 3
   ろ過is filtered through celite
4. 4
   濃縮The filtrate is concentrated to an oil which
5. 5
   その他is purified by flash chromatography with CH2Cl2

実験手順

A mixture of [2-(7-hydroxy-1H-indol-3-yl)-1,1-dimethyl-ethyl]-carbamic acid tert-butyl ester (15.55 g, 51.1 mmol), bromoacetonitrile (10.7 mL, 153 mmol), K2CO3 (17.78 g, 128.6 mmol) and 2-butanone is heated to reflux. After 1 hour the mixture is allowed to cool and is filtered through celite. The filtrate is concentrated to an oil which is purified by flash chromatography with CH2Cl2 followed by 5% ethyl acetate/CH2Cl2 to give 15.18 g of [2-(7-cyanomethoxy-1H-indol-3-yl)-1,1-dimethyl-ethyl]-carbamic acid tert-butyl ester (86%). MS (ES−) m/z 342.

出典