NOVEL REACTIONS OF AMINOOXOSULFONIUM YLIDE WITH EPOXIDES
作者:Kentaro Okuma、Kenshin Nishimura、Hiroshi Ohta
DOI:10.1246/cl.1984.93
日期:1984.1.5
Reactions of (dimethylamino)phenyloxosulfonium methylide with epoxides were carried out. When aromatic epoxides were used as substrates, cyclopropyl sulfones and oxetanes were obtained. When aliphatic epoxides were used, the products were only the cyclopropyl sulfones. While the aminooxosulfonium ylide acts as a methylene transfer reagent to give the corresponding oxetanes, an intramolecular SN2 type
Synthesis of 3,3-diphenyl-3H-pyrazoles applying vinyl sulfones as chemical equivalents of acetylenes in reaction of 1,3-dipolar cycloaddition to diphenyldiazomethane
作者:V. A. Vasin、V. V. Razin、E. V. Bezrukova、D. Yu. Korovin、P. S. Petrov、N. V. Somov
DOI:10.1134/s1070428015080138
日期:2015.8
α-bromovinyl phenylsulfones and a-bromovinyl methyl sulfones with diphenyldiazomethane afforded the corresponding 3-bromo- 5,5-diphenyl-3-sulfonyl-Δ1-pyrazolines. The first among them at 20°C suffered spontaneous elimination of molecular nitrogen and converted into 1-bromo-2,2-diphenyl-1-(phenylsulfonyl)cyclopropane whose structure was established by X-ray diffraction analysis. The action of DBU on another