Organocatalytic Alkyne Isomerizations under Flow Conditions Using Heterogeneous Bifunctional Polystyrene Bearing Phosphine and Phenol Groups
作者:Andreas Kirschning、Patrick Toy、Sascha Ceylan、Henry Law
DOI:10.1055/s-0036-1588589
日期:——
polymer bearing phosphine and phenol groups was developed to catalyze the isomerization of electronically activated alkynes. This organocatalytic process provided the corresponding (E,E)-dienes and was shown to work under both batch and flow conditions. A heterogeneous bifunctional polymer bearing phosphine and phenol groups was developed to catalyze the isomerization of electronically activated alkynes
Silver‐Catalyzed Olefination of Aryl Aldehydes Using Propiolates
作者:Rina Raju Manwar、Rengarajan Balamurugan
DOI:10.1002/chem.202401905
日期:2024.8.27
demonstrated as olefinating agents in the silver-catalyzed olefination of aryl and cinnamyl aldehydes to make α,β- and α,β,γ,δ-unsaturated esters with excellent E-selectivity. Trimethyl orthoformate plays a dual role by generating nucleophilic allenolate from propiolate and more electrophilic oxocarbenium ion fromaldehyde to effect the reaction.
Liquid Crystal Photoalignment Agent, Liquid Crystal Photoalignment Film Using the Same, and Liquid Crystal Display Device Including the Liquid Crystal Photoalignment Film
申请人:YOO Yong-Sik
公开号:US20130165598A1
公开(公告)日:2013-06-27
Disclosed are a liquid crystal photoalignment agent, a liquid crystal photoalignment film using the same, and a liquid crystal display including the liquid crystal photoalignment film. The liquid crystal photoalignment agent includes a polymer including polyamic acid including a repeating unit represented by Chemical Formula 1, polyimide including a repeating unit represented by Chemical Formula 2, or a combination thereof, or includes a first polymer including polyamic acid including a repeating unit represented by Chemical Formula 5, polyimide including a repeating unit represented by Chemical Formula 6, or a combination thereof; and a second polymer including polyamic acid including a repeating unit represented by Chemical Formula 7, polyimide including a repeating unit represented by Chemical Formula 8, or a combination thereof, wherein Chemical Formulae 1, 2 and 5 to 8 are the same as defined in the detailed description.