Palladium-scavenging self-assembled hybrid hydrogels – reusable highly-active green catalysts for Suzuki–Miyaura cross-coupling reactions
作者:Petr Slavík、Dustin W. Kurka、David K. Smith
DOI:10.1039/c8sc04561e
日期:——
with acyl hydrazides combined with agarose was used for in situ reduction and binding of palladium from aqueous mixtures without the need for an external reducing agent. Palladium uptake was monitored and the formation of Pd nanoparticles (PdNPs) trapped within the gel and located close to the nanofibres was confirmed. This gel effectively scavenges palladium from solution to concentrations < 0.04 ppm
Cycloaddition Chemistry of Tetrafluorothiophene <i>S</i>,<i>S</i>-Dioxide
作者:David M. Lemal
DOI:10.1021/acs.joc.6b00848
日期:2016.6.17
Tetrafluorothiophene S,S-dioxide has been found to be a powerful and versatile cycloaddend that undergoes a wide range of reactions as a Diels–Alder diene, dienophile, and [2 + 2] addend. Because it dimerizes only slowly at high temperatures, a broad range of conditions are available for these transformations. Reactions with terminal alkynes yield products of both Diels–Alder and [2 + 2] cycloaddition