Mechanism of oxidation of α,β-unsaturated thiones by singlet oxygen
作者:V.Pushkara Rao、V. Ramamurthy
DOI:10.1016/s0040-4020(01)96589-5
日期:1985.1
of α,β-unsaturated thiones yields the corresponding ketones as the only product. Studies carried out on three systems, namely thioketones, α,β-unsaturated thiones and thioketenes, have revealed that there exists a similarity in their mechanism of oxidation. It has been suggested that the thiocarbonyl chromophore is the site of attack by singlet oxygen in α,β-unsaturated thiones and that the adjacent
Mechanistic investigations into the photochemical oxidation of thioketones
作者:N. Ramnath、V. Ramesh、V. Ramamurthy
DOI:10.1039/c39810000112
日期:——
Singlet-oxygen reaction with dialkyl, aryl alkyl, and diaryl thioketones is found to give the corresponding sulphines and ketones in proportions depending on the nature of the thioketone.
The reaction of thiobenzophenones (1) with phenyl[2-(trimethylsilyl)phenyl]iodonium trifluoromethanesulfonate (4) in the presence of tetrabutylammonium fluoride afforded the corresponding [4+2] cycloadducts, which are the first examples of thiobenzophenone-benzyne adducts. The reaction of thiopivalophenone (6) with benzyne prepared from 4 and tetrabutylammonium fluoride at room temperature gave [2+2]
Reaction of Thiopivalophenones with Benzyne. Formation of 2H-Benzo[b]thietes
作者:Kentaro Okuma、Kyoko Shiki、Kosei Shioji
DOI:10.1246/cl.1998.79
日期:1998.1
Reaction of thiopivalophenone with phenyl[2-(trimethylsilyl)phenyl]iodonium trifluoromethanesulfonate in the presence of tetrabutylammonium fluoride afforded the corresponding [2+2] cycloadduct, 2-tert-butyl-2-p-tolyl-2H-benzo[b]thiete, in 58% yield. On the other hand, reaction of thiopivalophenone with benzenediazonium 2-carboxylate gave 2-tert-butyl-2-p-tolyl-benzo[d][3,1]oxathiane-6-one in 82% yield