Direct C4–H phosphonation of 8-hydroxyquinoline derivatives employing photoredox catalysis and silver catalysis
作者:Xiaoxue Su、Fan Yang、Yusheng Wu、Yangjie Wu
DOI:10.1039/c8ob00370j
日期:——
A simple and efficient protocol for the C4–H phosphonation of 8-hydroxyquinoline derivatives was developed under a photoredox/silver(I) cocatalysis system, providing a new approach to phosphonated 8-hydroxyquinoline derivatives. Note that the reaction did not occur at the C5 site, but regioselectively at an unusual C4 site. Moreover, the reaction proceeded smoothly under mild reaction conditions (a
mechanisms. In this study, we identified a quinolin-chlorobenzothioate, QCBT7, as a new proteasome inhibitor showing cytotoxicity in a panel of cancer cell lines. QCBT7 is a more stablederivative of quinoline-8-thiol that targets the regulatory subunit instead of the catalytic subunit of the proteasome. QCBT7 caused the accumulation of ubiquitylated proteins in the cancer cells, indicating its proteasome
8-Hydroxyquinoline Benzoates as Highly Sensitive Fluorescent Chemosensors for Transition Metal Ions
作者:Han Zhang、Li-Feng Han、Klaas A. Zachariasse、Yun-Bao Jiang
DOI:10.1021/ol051614h
日期:2005.9.1
see text] 8-Hydroxyquinoline benzoates were developed as a new set of 8-HQ derivatives for highly sensitive fluorescentchemosensors for transition metalions. A prominent fluorescence enhancement was found in the presence of transition metalions such as Hg2+ and Cu2+, and this was suggested to result from the suppression of radiationless transitions from the npi state in the chemosensors.
A practical and efficient protocol for Ag/Ru-cocatalyzed regioselective C-H amination of 8-hydroxyquinoline esters with pyrazoles was developed, This reaction proceeded smoothly via a photoredox-mediated direct C-H/N-H oxidative coupling process. The remarkable features of this reaction include the wide substrate scope, mild reaction conditions and high regioselectivity at the C4 site of the quinolinyl
Quinolin-8-yl Formate: A New Option for Small-Scale Carbonylation Reactions in Microwave Reactors
作者:J. Craig Ruble、Christopher J. Maddocks、Sivakumar V. Aathimanikandan、Jeffery Richardson
DOI:10.1055/s-0040-1707187
日期:2020.10
benzyl halides in a microwave reactor by using quinolin-8-yl formate is described. The resulting 8-acyloxyquinolines were shown to be more reactive than phenylesters in acyl-transfer reactions, and their utility for the production of esters and amides was demonstrated.