Method for the production of dibenz[c,e] [1,2]-oxaphosphorin derivatives, amino-dibenz[c,e] [1,2]-oxaphosphorin and also use thereof

Abstract

The invention relates to general syntheses of (6H)-dibenz[c,e] [1,2]-oxaphosphorins which are substituted with nitrogen compounds on the phosphorus atom and comprising commercially available 6H-dibenz[c,e] [1,2]-oxaphosphorin-6-oxides. These nitrogen-containing (6H)-dibenz[c,e] [1,2]-oxaphosphorins can be used as reactive starting substances for further syntheses or as flameproofing agents or as stabilisers.

Description

technical field [0001] The present invention relates to the general use of 9,10-dihydro-9-oxa-10-phosphaphenanthrene ((6H)-dibenz[c,e][1,2]-oxaphosphorins) substituted with nitrogen compounds on the phosphorus atom Synthetic method involving commercially available 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide. These nitrogen-containing 9,10-dihydro-9-oxa-10-phosphaphenanthrene can be used as reaction raw materials for further synthesis or as flame retardants or stabilizers. Background technique [0002] The only known preparation of 10-alkylamino-9,10-dihydro-9-oxa-10-phosphaphenanthrene (6-alkylamino-(6H)-dibenz[c,e][1,2]-oxaphosphorins) The method is 10-chloro-9,10-dihydro-9-oxa-10-phosphaphenanthrene (6-chloro-(6H)-dibenz[c,e][1,2]-oxaphosphorins) and amine transform. [0003] [0004] Alkylamino-Oxaphosphaphenanthrene [0005] This method is described in EP 0 005 441 B1 and JP 54138565. [0006] In the known method of synthesizing ...

AI Technical Summary

Problems solved by technology

However, these chlorinated oxaphosphaphenanthrenes are very sensitive to hydrolysis and in addition are particularly unsta

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