Chiral oxygenated aliphatic moieties are recurrent in biological and pharmaceutically relevant molecules and constitute one of the most versatile types of functionalities for further elaboration. Herein we report a protocol for straightforward and general access to chiral γ-lactones via enantioselective oxidation of strong nonactivated primary and secondary C(sp3)–H bonds in readily available carboxylic
The invention provides novel polymer compositions and methods for preparing such compositions. The invention also provides methods for polymerizing various unsaturated monomers, including naturally occurring or plant biomass-derived renewable acrylic monomers. The monomers can be rapidly polymerized using various organic catalysts or organometallic catalysts, as described herein. In one embodiment, nearly perfectly isotactic polymers (mmmm>99%) can be prepared using a C
2
-symmetric zirconocenium catalyst.
US9309332B2
申请人:——
公开号:US9309332B2
公开(公告)日:2016-04-12
[EN] POLYMERS USEFUL IN PHOTORESIST COMPOSITIONS AND COMPOSITIONS THEREOF<br/>[FR] POLYMÈRES UTILES DANS DES COMPOSITIONS DE PHOTORÉSIST ET COMPOSITIONS LES COMPRENANT
申请人:AZ ELECTRONIC MATERIAL USA COR
公开号:WO2008087549A1
公开(公告)日:2008-07-24
[EN] The present application relates to a polymer having the formula (I) where R30, R31, R32, R33, R40, R41, R42, jj, kk, mm, and nn are described herein. The compounds are useful in forming photoresist compositions. [FR] Le présent brevet concerne un polymère de formule (I) où R30, R31, R32, R33, R40, R41, R42, jj, kk, mm et nn sont décrits ici. Les composés sont utiles pour former des compositions de photorésist.