Synthesis method of 2,2-bis[3,5-dibromo-4-(2,3-dibromo-2-methylpropoxy)phenyl]propane

• Main Authors: WU SHOUYU, XU CHUNQING, XU WEIMING, ZHENG XUEJUN, BAI GUANGMING
• Format: Patent
• Language: Chinese; English
• Published: 22.11.2019
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The invention relates to the technical field of flame retardants, and provides a synthesis method of 2,2-bi[3,5-dibromo-4-(2,3-dibromo-2-methylpropoxy)phenyl]propane, which comprises the following steps: mixing 2,2-bis[4-(2-methylallyloxy)phenyl]propane, bromine and a solvent, and carrying out addition reaction to obtain an addition product solution; and adding a catalyst, hydrobromic acid and hydrogen peroxide into the addition product solution to carry out a substitution reaction so as to obtain the 2,2-bis[3,5-dibromo-4-(2,3-dibromo-2-methylpropoxy)phenyl]propane. According to the method, aone-pot method is adopted for step-by-step bromination; bromine addition is firstly carried out on double bonds in 2,2-bi[4-(2-methylallyloxy)phenyl]propane molecules, then bromine atom substitutionis carried out on benzene rings in an addition product structure, the raw material bromine is completely utilized, the problem that excessive bromine needs to be treated is solved, aftertreatment is convenient, the process is