98921-99-4Relevant articles and documents
Expedient Synthesis of Heterobifunctional Triarylmethane Stoppers for Macromolecular Rotaxanes
De Bo, Guillaume,Shvetsova, Olga,Zhang, Min
, p. 2770 - 2774 (2020)
Increasingly complex rotaxane-based molecular devices are interfaced with polymers and surfaces, but suitable bifunctional stoppering groups are lacking. Here, we report a two-step, high-yielding synthesis toward a new class of heterobifunctional triarylmethane stoppers. They possess hydroxyl and ester groups for further functionalization as well as halogen substituents conferring a diagnostic spectroscopic signature. Their utility was demonstrated with the synthesis of a chain-centered macromolecular rotaxane. This new stopper architecture should prove useful to connect rotaxanes with polymers and surfaces for applications in polymer mechanochemistry, single-molecule force spectroscopy, smart materials, and molecular machines.
In Situ Generated Palladium on Aluminum Phosphate as Catalytic System for the Preparation of β,β-Diarylated Olefins by Matsuda-Heck Reaction
Lucks, Sandra,Brunner, Heiko
, p. 1835 - 1842 (2017/11/24)
In situ generated palladium on aluminum phosphate provides a novel and active catalytic system for the preparation of β,β-diarylated olefins using the Matsuda-Heck reaction. The reaction conditions of this catalytic protocol were optimized by a Response-Surface model.
An in Situ Generated Palladium on Aluminum Oxide: Applications in Gram-Scale Matsuda-Heck Reactions
Pape, Simon,Dauk?ait?, Lauryna,Lucks, Sandra,Gu, Xiaoting,Brunner, Heiko
supporting information, p. 6376 - 6379 (2016/12/23)
In situ generated palladium on aluminum oxide provides an active catalytic system for Matsuda-Heck reactions in gram-scale. The novel catalyst proceeded through a significantly higher catalytic activity compared to the classical Pd/C system. Based on the high catalytic activity the first α,β,β-triarylation of methyl acrylate in good yields could be provided in one-step.
