Polymer resin functionalization route

Hi. The monomer polymerization route. Compared with the resin-functionalization route, the homo- and copolymerization of organotin-containing monomers permits one to influence the polymer resin structure to a greater extent. In principle, it is possible to prepare gel-type, macroporous, microporous or nonporous polymers. The pore structure, tin loading, solubility and other factors which influence the reactivity of the polymer-supported organotin reagents can be controlled by appropriate... 

In a more recent study, Westman and Lundin have described solid-phase syntheses of aminopropenones and aminopropenoates en route to heterocycles [32], Two different three-step methods for the preparation of these heterocycles were developed. The first method involved the formation of the respective ester from N-pro-tected glycine derivatives and Merrifield resin (Scheme 7.12 a), while the second method involved the use of aqueous methylamine solution for functionalization of the solid support (Scheme 7.12 b). The desired heterocycles were obtained by treatment of the generated polymer-bound benzylamine with the requisite acetophenones under similar conditions to those shown in Scheme 7.12 a, utilizing 5 equivalents of N,N-dimethylformamide diethyl acetal (DMFDEA) as reagent. The final... 

Catalysis has also had a major impact on the functional and specialty chemicals businesses, providing lower cost routes and higher performance materials than would have otherwise been possible. Major examples are from polymer syntheses including Ziegler-Natta, anionic, cationic polymerization processes, for formation of polyolefins, ABS resins, polyesters and other synthetic materials. Future materials areas include high temperature composites, electronic materials and conducting organics. 

Cyclic carbonate functional polymers have been prepared using several different routes. Bisphenol-A epoxy resins have been transformed into cyclic... 

Phosphorus, the most important ligand element, can be introduced via many routes. For example, (1) halogenated polystyrene is reacted with butyllithium followed by reaction with ClPPh2 (Evans et al., 1974) and (2) the resin is treated with PPh2Li (Nonaka et al., 1974) to produce the same functionalized polymer. The supports thus produced have been used to immobilize carbonyls such as Ni(CO)4 (Nonaka et al., 1974), (PPh3)3RhH(CO) (Pittman and Felis, 1974), and Rh6(CO)ig (Collman et al., 1972). 

---