1,2-Oxaphospholanes

Details 1,2-Oxaphospholanes 1,2-Oxaphospholanes

1975-09-18

1977-08-16

Sutto, Anton H.

Chemistry of carbon compounds

Dipeptides, e.g., aspartame, anserine, carnosine, etc.

260 457P, 260970, C07F 915, C08K 553

Patent

active

040426491

ABSTRACT:
2-Oxo-2-alkoxy-5-dialkylphosphono-1,2-oxaphospholanes of the formula ##STR1## in which R.sub.1 to R.sub.7 are hydrocarbon radicals can be prepared from .alpha.,.beta.-unsaturated ketones and 2 or more moles of a dialkyl phosphite. Obviously .gamma.-ketophosphonates are intermediates of this reaction as these compounds react with 1 or more moles of dialkyl phosphite in yielding the oxaphospholanes too. Both reactions are promoted by alkaline catalysts.
The new oxaphospholane derivatives are considerably stable against thermal decomposition. They can be used as flame retardants in epoxy resins.

REFERENCES:
Arbuzov et al., "Izv. Akad. Nauk. USSR", Ser. Khim 12, 2757 (1971).

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