反応 #168932

反応方程式

3-isopropyl phenol

Hypochlorous acid tert-butyl ester

→

2-chloro-5-isopropyl-phenol

4-chloro-3-isopropyl-phenol

収率 104.4%

溶媒

benzene CHCl3

反応条件

後処理

1. 1
   濃縮After 16 h the mixture was concentrated in vacuo
2. 2
   その他to give a crude oil
3. 3
   その他Purification via flash chromatography

実験手順

A solution of 3-isopropyl phenol (10.0 g, 73.4 mmol) in 350 mL 9:1 benzene/CHCl3 was cooled to 0° C. Hypochlorous acid tert-butyl ester (8.77 g, 80.8 mmol) was added drop-wise over 5 min and the mixture was allowed to warm to rt. After 16 h the mixture was concentrated in vacuo to give a crude oil. Purification via flash chromatography afforded 2-chloro-5-isopropyl-phenol and 4-chloro-3-isopropyl-phenol (6.540 g, 52%) as a 7:3 inseparable mixture of isomers in the form of a pale yellow oil. The combined regioisomers were used together in the following step.

出典