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ChemicalBook CAS DataBase List 4-Chlororesorcinol
95-88-5

4-Chlororesorcinol synthesis

12synthesis methods
4-Chlororesorcinol is synthesized by reacting resorcinol with dichlorosulfuryl. Resorcinol and diethyl ether were mixed, heated to reflux with stirring, and dichlorosulfuryl was slowly added dropwise. The temperature was then raised to 60°C for 1 h. After recovery of ether, atmospheric distillation is carried out, the distillate is subjected to vacuum distillation again, and the 131°C (0.8-0.93kPa) or 160-164°C (4.0kPa) fractions are collected to obtain the finished 4-chlororesorcinol.
-

Yield:-

Steps:

Multi-step reaction with 3 steps
1: POCl3 / benzene / Heating
2: SO2Cl2 / benzene / Heating
3: (i) aq. NaOH, (ii) (decarboxylation)

References:

Ruschig;Konig;Duwel;Loewe [Arzneimittel-Forschung/Drug Research,1973,vol. 23,# 12,p. 1745 - 1758]

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