The synthesis of novel chromogenic enzyme substrates for detection of bacterial glycosidases and their applications in diagnostic microbiology
作者:Michael Burton、John D. Perry、Stephen P. Stanforth、Hayley J. Turner
DOI:10.1016/j.bmc.2018.08.023
日期:2018.9
detecting bacterial glycosidase enzymes is reported. These substrates are monoglycoside derivatives of the metal chelators catechol, 2,3-dihydroxynaphthalene (DHN) and 6,7-dibromo-2,3-dihydroxynaphthalene (6,7-dibromo-DHN). When hydrolysed by appropriate bacterialenzymes these substrates produced coloured chelates in the presence of ammonium iron(III) citrate, thus enabling bacterialdetection. A β-d-riboside
Synthesis of Phthalonitriles
Using a Palladium Catalyst
作者:Michael Hanack、Zafar Iqbal、Alexey Lyubimtsev
DOI:10.1055/s-2008-1078269
日期:——
An easy synthetic method to obtain phthalonitriles from o-dibromobenzenes under mild conditions in high yields using Zn(CN)2 and a catalytic amount of tris(dibenzylideneacetone)dipalladium and 1,1′-bis(diphenylphosphino)ferrocene is described.
Synthesis of Substituted Dibenz[<i>a</i>,<i>c</i>]anthracenes and an Investigation of Their Liquid-Crystalline Properties
作者:Katie M. Psutka、Joshua Williams、Joseph A. Paquette、Oliver Calderon、Kevin J. A. Bozek、Vance E. Williams、Kenneth E. Maly
DOI:10.1002/ejoc.201403504
日期:2015.3
We report the synthesis of a series of 2,3,5,6-tetraalkoxydibenz[a,c]anthracenes bearing substituents (H, OCH3, or CN) in the 11- and 12-positions and an investigation of their liquid-crystalline properties. The synthesis involved Suzuki coupling of the appropriate dibromonaphthalene and boronate ester, followed by an oxidative cyclization. Compounds 4 and 5, bearing OCH3 and H, respectively, do not
The synthesis of O-doped benzorylenes, in which peripheral carbon atoms have been replaced by oxygen atoms, has been achieved for the first time. This includes key high-yielding ring-closure steps which, through intramolecular C-O bond formation, allow stepwise planarization of oligonaphthalenes. Single-crystal X-ray diffraction showed that the tetraoxa derivative forms remarkable face-to-face π-π
distinct molecular dipoles. All compounds are analyzed regarding their optoelectronic properties in solution with special focus on the frontier orbital energies as well as their molecular packing in the crystal structures. The analyses of isolated molecules are complemented by thin‐film studies to examine their solid‐state properties. A precise comparison between these and the molecularproperties gave