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    • 10. 发明授权
    • Bis(4-hydroxy-3,5-dialkylbenzyl)cyano-carboxylic acid esters
    • 双(4-羟基-3,5-二烷基苄基)氰基 - 羧酸酯
    • US3950382A
    • 1976-04-13
    • US511078
    • 1974-10-01
    • Heinz EggenspergerVolker FranzenKarl-Heinz DiehlWilfred Kloss
    • Heinz EggenspergerVolker FranzenKarl-Heinz DiehlWilfred Kloss
    • C07C255/53C08K5/315C07C121/76
    • C07C255/00C07C323/00C08K5/315
    • The reaction of one mole of a Mannich base corresponding to the formula ##SPC1##And one mole of a Mannich base corresponding to the formula ##SPC2##Wherein R.sub.1, R.sub.2, R.sub.4 and R.sub.5 are independently selected from alkyl groups having 1 to 6 carbon atoms and R is alkyl, preferably lower alkyl, with 1 mole of a carboxylic acid ester corresponding to the formula R.sub.3 CH.sub.2 COOR.sub.4 wherein R.sub.3 is --H, --CN or --COOR.sub.4 and R.sub.4 is an alkyl, thioether, 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 ##SPC3##The compounds represented by the above formula are useful as stabilizers for synthetic resins, particularly polyolefins. Compounds of the above formula, when R.sub.3 is --CN are novel and may also be prepared by reacting 1 mole of ##SPC4##And 1 mole of ##SPC5##Wherein X is halogen with 1 mole of NCCH.sub.2 COOR.sub.4 in the presence of an alkali metal and an anhydrous inert organic solvent.
    • 对应于对应于式WHEREIN R1,R2,R4和R5的曼尼希碱的式1的曼尼希碱的1摩尔曼尼希碱的反应独立地选自具有1至6个碳原子的烷基,R是烷基,优选 低级烷基,与1摩尔对应于式R3CH2COOR4的羧酸酯,其中R3是-H,-CN或-COOR4,R4是在催化剂存在下具有至多20个碳的烷基,硫醚,氧醚或芳烷基 有效量的碱性催化剂可用于制备相应于式的化合物。由上式表示的化合物可用作合成树脂,特别是聚烯烃的稳定剂。 当R3是-CN时,上式的化合物是新的,也可以通过使1摩尔的X 1为1的X为卤素的1 MOLE与1摩尔的NCCH 2 COOR 4在碱金属和无水惰性有机溶剂的存在下反应来制备。