S<sub>H<sup>2</sup></sub>REACTIONS OF SELENOSULFIDES WITH CARBON RADICALS
作者:Masato Yoshida、Toshitsura Cho、Michio Kobayashi
DOI:10.1246/cl.1984.1109
日期:1984.7.5
o-Nitrophenyl phenylselenyl sulfide suffered SH2 attack by carbon radicals on selenium atom to give selenide and thiyl radical; the relative rate constant of the selenosulfide with phenyl radical was compared with those of the other selenium compounds.
Synthesis and spin trapping chemistry of a novel bicyclic nitrone: 1,3,3-trimethyl-6-azabicyclo[3.2.1]oct-6-ene-N-oxide (Trazon)
作者:Nagaraju Sankuratri、Edward G. Janzen
DOI:10.1016/0040-4039(96)01102-1
日期:1996.7
biological systems. In this communication the synthesis and use of a novel bicyclic nitrone 1,3,3-trimethyl-6-azabicyclo[3.2.1]oct-6-ene-N-oxide (Trazon) as a spintrapping compound is proposed. Trazon is a stable, crystalline solid with an excellent shelf life. The EPR spectra of Trazon spin adducts have similar EPR parameters as compared to 5-membered ring nitrones but there is extra information present
wavelength effects indicate that 9-phenylfluorene is produced by the photoreaction of a trityl cation which is generated by the decomposition of a radical cation of PAT. The results of the experiments of laser flash photolysis suggest that the rate of back electron transfer between a radicalanion of the sensitizer and a trityl cation plays an important role in these react...
The present invention features modified superporous hydrogels (SPHs) and methods for their formation. The SPHs of the present invention are prepared by careful selection of the hydrophobic/hydrophilic reactive ingredients and by harmonizing the foaming and polymerization reactions, which results in the formation of SPHs having a homogeneous structure and favorable physical and mechanical properties, including swelling, strength, ruggedness, and resiliency. The SPHs of the present invention are particularly useful when employed in very harsh swelling environments, such as the low pH environment of the gastric fluid of the stomach, for extended periods of time.
Copolymerization of Fe(II) or Co(II) pyridine diimine complexes containing olefinic substituents on aryl groups with styrene in the presence of a radical initiator results in polymerized late transition metal catalysts which can be used for olefin polymerization or oligomerization. These catalysts have high catalyst activity for olefin polymerization or oligomerization.