Process for preparing bis-(4-hydroxy-3,5-dialkylbenzyl) carboxylic acid esters
Abstract
Abstract The reaction of one mole of a Mannich base corresponding to the formula AND ONE MOLE OF A Mannich base corresponding to the formula WHEREIN R1, R2, R4 and R5 are independently selected from alkyl groups having one to six carbon atoms and R is alkyl, preferably lower alkyl, with 1 mole of a carboxylic acid ester corresponding to the formula R3CH2COOR4 wherein R3 is -H, -CN or -COOR4 and R4 is an alkyl, thioethers oxyether or aralkyl group having up to 20 carbons in the presence of a catalytically effective amount of an alkaline catalyst is useful for preparing compounds corresponding to the formula The compounds represented by the above formula are useful as stabilizers for synthetic resins, particularly polyolefins. Compounds of the above formula, when R3 is -CN are novel and may also be prepared by reacting 1 mole of AND 1 MOLE WHEREIN X is halogen with 1 mole of NCCH2COOR4 in the presence of an alkali metal and an anhydrous inert organic solvent.
Inventors
- 👤 H Eggensperger
- 👤 V Franzen
- 👤 K Diehl
- 👤 W Kloss
Bibliographic Details
Claims Analysis
Total Claims: 18References Cited (Backward Citations)
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