Process for the preparation of sterically hindered hydroxybenzyl

Details Process for the preparation of sterically hindered hydroxybenzyl Process for the preparation of sterically hindered hydroxybenzyl

1992-04-01

1992-12-15

Lee, Mary C.

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

Organic compounds

Phosphorus esters

558194, C07F 940

Patent

active

051718731

ABSTRACT:
A process for the preparation of hydroxybenzylphosphonates of forula ##STR1## by reacting Mannich base of formula ##STR2## with as trialkyl phosphite of formula ##STR3## wherein R.sub.1 and R.sub.2 are each independently of the other C.sub.1 -C.sub.12 alkyl or, when taken together form a piperidinyl or morpholinyl radical, and R.sub.5, R.sub.6 and R.sub.7 are each independently of one another C.sub.1 -C.sub.4 alkyl, which reaction is carried out in the presence of a carboxylic anhydride (IV).
The compounds of formula I may suitably be used as processing stabilizers for plastics.

REFERENCES:
patent: 3006945 (1961-10-01), Goddard et al.
patent: 3155704 (1964-11-01), Knapp
patent: 3155704 (1964-11-01), Knapp
patent: 3268630 (1966-08-01), Spivack
patent: 3280070 (1966-10-01), Di Battista et al.
patent: 3281505 (1966-10-01), Spivack
patent: 3367870 (1968-02-01), Spivack
patent: 3787540 (1974-01-01), Schmidt et al.
patent: 3790648 (1974-02-01), Schmide et al.
patent: 4263232 (1981-04-01), Parekh
Derwent Abst. 73-63841u/43; DE 2,312,910 (1974).
Ovchinnikor et al., Cyclic Phosphoorganic Compounds With an Active Methylene Group p. 834 (1981).

Affiliated with

Also associated with

Rating

Process for the preparation of sterically hindered hydroxybenzyl does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of sterically hindered hydroxybenzyl, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of sterically hindered hydroxybenzyl will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2094357