N,N,N',N'-Tetrasubstituted 1,4-diamino-2-butenes where the substituents are alkyl, cycloalkyl, aralkyl, aryl or mixtures thereof provide effective antioxidant protection to lubricants and/or synthetic polymers.
Green and Scalable Palladium-on-Carbon-Catalyzed Tsuji-Trost Coupling Reaction Using an Efficient and Continuous Flow System
作者:Clément Cazorla、Muriel Billamboz、Hervé Bricout、Eric Monflier、Christophe Len
DOI:10.1002/ejoc.201601311
日期:2017.2.10
continuous flow Tsuji-Trost coupling reaction between allylic compounds and various nucleophiles was successfully achieved within only ca. 40 s during the single-pass through a cartridge filled with palladium on carbon (Pd/C). Two methods have been designed using the H-cube ThalesNano technology and enable the efficient production of add-valued compounds in the gramm-scale with high productivity. Under
Compounds of formula I
wherein X is a group of formula Ia or Ib,
R₁ and R₂ are independently e.g. hydrogen, alkyl, alkenyl, aryl or phenylalkyl, and R₃ to R₇ are independently e.g. hydrogen, alkyl or substituted alkyl are very effective process stabilizers for polymeric systems providing melt flow stabilization and resistance to discoloration during processing at elevated temperatures as well as effective stabilizers for lubricant compositions.
式 I 的化合物
其中 X 是式 Ia 或 Ib 的基团、
R₁ 和 R₂ 独立地为氢、烷基、烯基、芳基或苯基烷基,以及 R₃ 至 R₇ 独立地为氢、烷基或取代烷基,是非常有效的聚合物体系加工稳定剂,可在高温加工过程中提供熔体流动稳定和抗变色性能,同时也是润滑剂组合物的有效稳定剂。
Substituted 1,4-diamino-2-butene stabilizers and stabilized compositions
申请人:CIBA-GEIGY AG
公开号:EP0514333A2
公开(公告)日:1992-11-19
N,N,N′,N′-Tetrasubstituted 1,4-diamino-2-butenes where the substituents are alkyl, cycloalkyl, aralkyl, aryl or mixtures thereof provide effective antioxidant protection to lubricants and/or synthetic polymers.