1,2-oxaphospholanes

Details 1,2-oxaphospholanes 1,2-oxaphospholanes

C - Chemistry, Metallurgy

07

F

260/457.2, 260/3

C07F 9/40 (2006.01) C07F 9/6571 (2006.01) C08K 5/5357 (2006.01) C08K 5/5373 (2006.01)

Patent

CA 1049030

Abstract of the Disclosure 2-Oxo-2-alkoxy-5-phosphono-1,2-oxaphospholanes of the formula Image in which R1 to R7 are hydrocarbon radicals can be pre- pared from .alpha.,.beta.-unsaturated ketone and 2 or more moles of a dialkylphosphite. Obviously .gamma.-ketophosphonates are intermediates of this reaction as these compounds react with 1 or more moles of dialkylphosphite in yielding the oxaphospholanes too. Both reactions are promoted by al- kaline catalysts. The new oxaphospholane derivatives are considerably stable against thermal decomposition. They are compatible with polymeric materials and can be used as flame protecting agent for plastics and resins, for example in polyurethane foams.

208588

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