PROCESS FOR THE PREPARATION OF STERICALLY HINDERED HYDROXYBENZYLPHOSPHONATES

A process for the preparation of hydroxybenzylphosphonates of formula by reacting a Mannich base of formula with a trialkyl phosphite of formula wherein R1 and R2 are each independently of the other C1-C12alkyl or C5- C7cycloalkyl, R3 and R4 are each independently of the other C1-C12alkyl or, when t...

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Bibliographische Detailangaben
Hauptverfasser:	MAUL, RUDOLF, KAINMULLER, THOMAS
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	A process for the preparation of hydroxybenzylphosphonates of formula by reacting a Mannich base of formula with a trialkyl phosphite of formula wherein R1 and R2 are each independently of the other C1-C12alkyl or C5- C7cycloalkyl, R3 and R4 are each independently of the other C1-C12alkyl or, when taken together, form a piperidinyl or morpholinyl radical, and R5, R6 and R7 are each independently of one another C1-C4alkyl, which reaction is carried out in the presence of a carboxylic anhydride (IV). The compounds of formula I may suitably be used as processing stabilisers fo r plastics.