Реакция #168932

Уравнение реакции

3-isopropyl phenol

Hypochlorous acid tert-butyl ester

→

2-chloro-5-isopropyl-phenol

4-chloro-3-isopropyl-phenol

Выход 104.4%

Растворители

benzene CHCl3

Условия реакции

Обработка

1. 1
   КонцентрированиеAfter 16 h the mixture was concentrated in vacuo
2. 2
   Другоеto give a crude oil
3. 3
   ДругоеPurification via flash chromatography

Методика

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.

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