Preparation and characterization of 4-isopropylphenyl boronic acid

ORGN 343

Yan Deng, dy_dengyan@yahoo.com.cn and Nongyue He, nyhe1958@163.com. State Key Laboratory of Bioelectronics, Southeast University, Sipailou 2, Nanjing, 210096, China
4-isopropylphenyl boronic acid was synthesized by Grignard reagent, and an optimized process was obtained by investigating the influence of the temperature and reactant proportion on the yield. First, Grignard reagent was prepared (yield is 98.2%), and then reacted with tributyl borate at 263 K, then hydrolyzed in a acid medium after the temperature was increased to room temperature in a short time. The isolated yield is 56.6%. The product was verified by 1H NMR and mass spectrum characterization.