Process for preparing tribromoneopentyl chloroalkyl phosphates

摘要

A process of preparing a tribromoneopentyl chloroalkyl phosphate of the formula (3): <CHEM> wherein R is hydrogen atom, an alkyl or chloroalkyl group. The process includes three steps: In the first step, an alkylene oxide is reacted with phosphorus trichloride in a chemical equivalent or less amount to the alkylene oxide to obtain a tris(chloroalkyl) phosphite of the formula (1): <CHEM> wherein R is the same as defined above. In the second step, the tris(chloroalkyl) phosphite is reacted with chlorine to obtain a bis(chloroalkyl) phosphorochloridate of the formula (2): <CHEM> wherein R is the same as defined above. And in the third step, the bis(chloroalkyl) phosphorochloridate is reacted with tribromoneopentyl alcohol.