Cycloaddition Reactions of Cobalt-Complexed Macrocyclic Alkynes: The Transannular Pauson–Khand Reaction
作者:Sedef Karabiyikoglu、Byron A. Boon、Craig A. Merlic
DOI:10.1021/acs.joc.7b01369
日期:2017.8.4
ring-closing metathesis reactions followed by complexation with dicobalt octacarbonyl. Several reaction modalities of these macrocyclic complexes were uncovered. In addition to the first successful transannular Pauson–Khand reactions, other intermolecular and transannular cycloadditionreactions included intermolecular Pauson–Khand reactions, transannular [4 + 2] cycloadditionreactions, intermolecular [2
Brominated Methanes as Photoresponsive Molecular Storage of Elemental Br<sub>2</sub>
作者:Kazumitsu Kawakami、Akihiko Tsuda
DOI:10.1002/asia.201200322
日期:2012.10
generation of elementalBr2 from brominatedmethanes is reported. Br2 was generated by the vaporization of carbon oxides and HBr through oxidative photodecomposition of brominatedmethanes under a 20 W low‐pressure mercury lamp, wherein the amount and situations of Br2 generation were photochemically controllable. Liquid CH2Br2 can be used not only as an organic solvent but also for the photoresponsive molecular
Synthesis and activity studies of analogues of the rat selective toxicant norbormide
作者:David Rennison、Sergio Bova、Maurizio Cavalli、Fernanda Ricchelli、Alessandra Zulian、Brian Hopkins、Margaret A. Brimble
DOI:10.1016/j.bmc.2007.02.012
日期:2007.4
Norbormide [5-(alpha-hydroxy-alpha-2-pyridylbenzyl)-7-(alpha-2-pyridylbenzylidene)-5-norborn ene-2,3-dicarboximide] (NRB, 1), an existing but infrequently used rodenticide, is known to be uniquely toxic to rats but relatively harmless to other rodents and mammals. A series of NRB-related analogues were prepared to investigate the structural features responsible for, and the in vitro biological markers
alcohols can be oxidised with activated manganese dioxide in the presence of stabilised Wittig reagents to generate α,β-unsaturated esters directly. This simple procedure, which can also be utilised with diols to give double homologation, is generally useful and particularly valuable if the intermediate aldehydes are difficult to isolate, toxic or prone to isomerisation.