(Alkanes do undergo a substitution reaction with halogens, but require activation by ultraviolet light to make the reaction proceed). Unsaturated hydrocarbons, alkenes and alkynes, not only burn, but also react by of reagents to the double or triple bonds. The addition products are saturated, ...
37. These reactions include, for instance, the selective hydrogenation of nitroarenes to amines38,39, the selective hydrogenation of aldehyde compounds to alcohol compounds40,41, and the epoxidation of alkenes to epoxides42,43. So
in structure and reactivity to the isoelectronic neutral tantalocene derivatives; for example, the nPr complex has a β-agostic alkyl ground state structure, and the system is able to catalyze the hydrogenation of 1-alkenes; the metal center is also able undergo oxidative addition reactions. The...
the use of main-group elements to harness this type of reactivity has been little explored. Here we show how a low-valency bismuth complex is able to undergo one-electron oxidative addition
Epoxides are well known commercially because of the many important reactions they undergo. Epoxidation of long chain olefins, and unsaturated fatty acid derivatives such as soybean oil and other plant oils is carried out on an industrial scale (Rios et al., 2005). Today, one of the most impor...
The mutation with MtTyr was found to induce a small normal substrate KIE (1.1) whereas the mutation with MeOTyr induced a small inverse KIE (0.9) in reactions with deuterated histidine [27,28]. These opposite behaviors may be related to subtle structural and electronic differences between the ...
Plants undergo a variety of sophisticated physiological, morphological, cellular, biochemical, and molecular processes to respond and adapt to drought stress [3,13]. Extensive research is being conducted to develop strategies that help plants to cope with drought stress. However, most of these technol...
cycloaddition reactionsVinyl ketenes, generated from the dienoic acids (I), (V), (VIII), and (XI) via their acid chlorides, undergo intramolecular cycloaddition to produce the fused cyclobutanones (II), (VI), and (VII), (IX) and (X) or (XII) and (XIII) as shown in the reaction ...
·OR(CO)OOH radicals mainly undergo two consecutive fast H-migration reactions and then react with O2to produce HO2radicals and hydroperoxyl-carbonyls (HPC)31. The photolysis of HPC is rapid, with a photolysis frequency as high as 10-4 s-1producing OH radicals, which has been proved by...
4d). Exemplified by 3aa, it could readily undergo oxidation in the presence of air, transforming into 2-(methylthio)-1-phenylethan-1-one (10). This reactivity explains why 3aa can be easily stained with (2,4-dinitrophenyl)hydrazine on thin-layer chromatography plates. To our knowledge, ...