The nature of lithium perchlorate and gallium chloride salt effect in cycloaddition reactions
作者:Yury G. Shtyrlin、Dmitry G. Murzin、Natalia A. Luzanova、Gulnara G. Iskhakova、Vladimir D. Kiselev、Alexandr I. Konovalov
DOI:10.1016/s0040-4020(98)00025-8
日期:1998.3
acceleration effect of cycloadditionreactions in the presence of such Lewis acids as aluminum, gallium or boron halides is due to the sharp increase of π-acceptor properties of dienophiles and therefore increasing energy of orbital interaction, whereas LPDE medium demonstrates strong stabilization of static and/or dynamic polar forms and favors reactions with chargecontrol.
This invention is related to the fields of organic chemistry and nanotechnology. In particular, it relates to materials and methods for the preparation of organic synthons and bridged macrocyclic module components. The bridge macrocyclic module compounds may be used to prepare macrocyclic module compositions such as nanofilms, which may be useful for filtration.
Palladium (II) catalyzed polymerization of norbornene and acrylates
申请人:——
公开号:US20020040115A1
公开(公告)日:2002-04-04
Homopolymers or copolymers of acrylates, homopolymers or copolymers of norbornenes, and copolymers of acrylates with norbornenes, may be prepared by contacting acrylate and/or norbornene monomer reactant under polymerization conditions and in the presence of a solvent with a catalyst system consisting essentially of a Pd(II) dimer component having the formula: [(L)Pd(R)(X)]
2
, where L is a monodentate phosphorus or nitrogen ligand, X is an anionic group, and R is an alkyl or aryl group.
丙烯酸酯的均聚物或共聚物、降冰片烯的均聚物或共聚物以及丙烯酸酯与降冰片烯的共聚物,可通过在聚合条件下和有溶剂存在的情况下将丙烯酸酯和/或降冰片烯单体反应物与主要由 Pd(II) 二聚物组分组成的催化剂体系接触来制备,该催化剂体系的化学式为:[(L)Pd(R)(X)]
2
其中 L 是单齿磷或氮配体,X 是阴离子基团,R 是烷基或芳基。