Nickel-Catalyzed Reductive Cross-Coupling of Aryl Bromides with Vinyl Acetate in Dimethyl Isosorbide as a Sustainable Solvent
作者:Mincong Su、Xia Huang、Chuanhu Lei、Jian Jin
DOI:10.1021/acs.orglett.1c04018
日期:2022.1.14
nickel-catalyzed reductive cross-coupling has been achieved using (hetero)arylbromides and vinyl acetate as the coupling partners. This mild, applicable method provides a reliable access to a variety of vinyl arenes, heteroarenes, and benzoheterocycles, which should expand the chemical space of precursors to fine chemicals and polymers. Importantly, a sustainable solvent, dimethyl isosorbide, is used
A PROCESS FOR PREPARING FUNCTIONAL POLYMERS THROUGH ADDITION OF AMINO AND POLYMERYL GROUPS TO ALDEHYDE MOIETIES
申请人:Dow Global Technologies LLC
公开号:US20180273654A1
公开(公告)日:2018-09-27
The present disclosure relates to a one-pot process for synthesizing functional compounds or functional polymers by reacting an aldehyde with an alkyl-zinc or polymeryl-zinc composition in the presence of a specific Lewis acid, wherein the reaction is rapid and facile at high temperatures.
The use of vinyl electrophiles in synthesis has been hampered by the lack of access to a suitable reagent that is practical and of appropriate reactivity. In this work we introduce a vinyl thianthrenium salt as an effective vinylating reagent. The bench-stable, crystalline reagent can be readily prepared from ethylene gas at atmospheric pressure in one step and is broadly useful in the annulation chemistry
Multinuclear half metallocene catalyst and method for preparing syndiotactic polystyrene using the same
申请人:LG Chem Ltd.
公开号:EP1777230A1
公开(公告)日:2007-04-25
Diclosed is a multinuclear transition metal half metallocene catalyst having a multinuclear half metallocene structure in which a transition metal of groups 3 to 10 on periodic table is connected to a cycloalkandienyl group or its derivative group on a side and also connected to phenol or phenolamine compound having a plurality of binding sites on another side. The metallocene catalyst is useful to produce syndiotatic styrene polymer having superior steroreguality, high melting point and broad molecular weight distribution with high activity together with a small amount of a cocatalyst. Further disclosed is a method for preparing styrene polymers using the same catalyst.