793-07-7Relevant academic research and scientific papers
Postsynthetic bromination of UiO-66 analogues: Altering linker flexibility and mechanical compliance
Marshall, Ross J.,Richards, Tom,Hobday, Claire L.,Murphie, Colin F.,Wilson, Claire,Moggach, Stephen A.,Bennett, Thomas D.,Forgan, Ross S.
, p. 4132 - 4135 (2016)
A new member of the UiO-66 series of zirconium metal-organic frameworks (MOFs) is reported, and the postsynthetic bromination of its integral alkene moeities in a single-crystal to single-crystal manner is fully characterised. Nanoindentation is used to p
Reactivity control of a photocatalytic system by changing the light intensity
Kerzig, Christoph,Wenger, Oliver S.
, p. 11023 - 11029 (2019/12/28)
We report a novel light-intensity dependent reactivity approach allowing us to selectively switch between triplet energy transfer and electron transfer reactions, or to regulate the redox potential available for challenging reductions. Simply by adjusting the light power density with an inexpensive lens while keeping all other parameters constant, we achieved control over one- and two-photon mechanisms, and successfully exploited our approach for lab-scale photoreactions using three substrate classes with excellent selectivities and good product yields. Specifically, our proof-of-concept study demonstrates that the irradiation intensity can be used to control (i) the available photoredox reactivity for reductive dehalogenations to selectively target either bromo- or chloro-substituted arenes, (ii) the photochemical cis-trans isomerization of olefins versus their photoreduction, and (iii) the competition between hydrogen atom abstraction and radical dimerization processes.
Reductive Homocoupling of Organohalides Using Nickel(II) Chloride and Samarium Metal
Liu, Yongjun,Xiao, Shuhuan,Qi, Yan,Du, Feng
, p. 673 - 678 (2017/03/22)
A homocoupling method for organohalides and organosulfonates promoted by samarium metal and HMPA, and catalyzed by NiCl2 has been developed. Various organohalides (benzyl, aryl, heterocyclic, alkenyl and alkyl halides), α-haloacetophenones, and phenyl organosulfonates were tolerated, and the reaction afforded coupling products with high efficiency. Excellent chemoselectivity was exhibited between halides and other groups, such as ?COOH, ?NO2, halogen, heterocyclic ring, ester, and ketone groups. The stereoselectivity suggested that the reaction mechanism might involve an organosamarium species.
Synthesis and Properties of Diethyl 5,10-Dihetera-5,10-dihydroindenoindene-2,7-dicarboxylates
Kaszynski, Piotr,Dougherty, Dennis A.
, p. 5209 - 5220 (2007/10/02)
A series of six heterocyclic diesters 1b-6b containing all combinations of nitrogen, sulfur, and selenium has been prepared from a common precursor, diethyl 2,2'-dinitrostilbene-4,4'-dicarboxylate.Electrochemical analysis showed oxidation potential increases in the order NA liquid crystals.A new synthetic method leading to the indoloindazole ring system has been found.
Reaktionen mit Radikalanionen, IV. Synthese von Mono- und Diketonen aus Carboxyl- und α,β-ungesaettigten Carbonyl-Verbindungen
Kirrstetter, Reiner G. H.,Vagt, Uwe
, p. 630 - 637 (2007/10/02)
1,2-Diketones of the benzil type were obtained in the reaction of aromatic carboxylic compounds with lithium naphthalenide.The scope of this reaction was investigated. α,β-Unsaturated ketones yielded hydrodimerisation, hydrogenation and hydroxylation products.
