하동수 교수

Abstract Buckminsterfullerene reects with aromatic benzene derivatives in the presence of Lewis acids such as aluminum trichloride or aluminum tribromide to give Friedel-Crafts fullerenation products. Polyhalogenated fullerenes also react with aromatic compounds to afford fullerylated aromatic compound under the Friedel-Crafts reaction conditions.

(Trimethylsilyl)methyl halides (1,3) and trifluoromethanesulfonate (triflate) (2) were prepared by inserting a methylene group into the siliconheteroatom bond of trimethylsilyl halides and triflate using diazomethane.

Chlorotrimethylsilane reacts with chromic anhydride to form a very reactive neutral chromium (Ⅵ) oxidizing agent. The active oxidizing species is not trimethylsilyl chlorochromate as was previously reported but chromyl chloride generated in equilibrium concentration. This oxidizing agent was proved very suitable for benzylic oxidations of toluenes and alkylbenzenes to benzaldehydes and aralkyl ketones. Dichlorodimethylsilane and trichlormethylsilane also react with chromic anhydride to form chro

Aryl methyl and aryl phenyl sulfides were prepared by the reaction of arenediazonium tetrafluoroborates with trimethyl(methylthio)-and trimethyl(phenylthio)silanes, respectively.In the latter case, addition of cupric sulfide was found to increase the yields.The main by-products were protodediazoniated products and diphenyl disulfide, which can be removed by treatment with aqueous sulfide and a base.

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Abstract Oxidation of toluene and methyl‐ or halo‐substituted toluenes with the title reagent or with chromyl chloride leads to similar yields of the corresponding monoaldehydes.

Background/Aims:As one of biological modifiers of immune reaction, thymomodulin is known to be peptide derivatives of thyrnic acid. Lysate, and thymomodulin can stimulate antibody formations by increasmg the functions of B and T tymphocytes. Furthermore, GM-CSF and TNF can be released by thymomodulin resulting in relief from bone marrow suppression. And these actions of thymomodulin affer a new therapeutic modality in chronic diseases ot the liver as well as chronic hronchitis. Although interfer

Abstract In the presence of basic Al 2 O 3 , prim. and sec. alcohols as well as aromatic ones such as (I) and (III) are oxidized probably by the species chromyl chloride or polyoxochromium(VI) dichloride resulting from CrO 3 and Me 3 SiCl.

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.