Process for preparing tribromoneopentyl chloroalkyl phosphates

Details Process for preparing tribromoneopentyl chloroalkyl phosphates Process for preparing tribromoneopentyl chloroalkyl phosphates

1997-05-20

1998-05-26

Ambrose, Michael G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus esters

558100, C07F 909

Patent

active

057567972

ABSTRACT:
A process of preparing a tribromoneopentyl chloroalkyl phosphate of the formula (3): ##STR1## , 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): ##STR2## , 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): ##STR3## , wherein R is the same as defined above. And in the third step, the bis(chloroalkyl) phosphorochloridate is reacted with tribromoneopentyl alcohol.

REFERENCES:
patent: 3707586 (1972-12-01), Turley
patent: 3803272 (1974-04-01), Pivawer et al.
patent: 4046719 (1977-09-01), Stanaback et al.
patent: 4083825 (1978-04-01), Albright et al.
patent: 5627299 (1997-05-01), Tokuyasu et al.

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