Synthesis and Decomposition of Some Dialkyl Oxide Derivatives of Organotrisulfides
摘要:
The isolation or detection of sulfenic sulfonic thioanhydrides 1 (e.g., 6), sulfenyl vic-disulfoxides 4 (e.g., 9, 14), and sulfinic thioanhydrides 5 (e.g., 20) has been carried out by oxidative procedures at various temperatures. The decomposition of these compounds has been investigated and is shown to be consistent with the mechanism proposed for the decomposition of trisulfide monoxides.
The antioxidant activity of polysulfides: it's radical!
作者:Jean-Philippe R. Chauvin、Markus Griesser、Derek A. Pratt
DOI:10.1039/c9sc00276f
日期:——
high temperatures, produces branched polysulfides. Due to their anti-wear properties, they are indispensible additives to lubricants, but are also added to other petroleum-derived products as oxidation inhibitors. Polysulfides also figure prominently in the chemistry and biology of garlic and other plants of the Allium species. We previously reported that trisulfides, upon oxidation to their corresponding
Anodic oxidation of di-tert-butyl disulfide: a facile method for the preparation of N-tert-butylamides
作者:Driss Elothmani、Quang Tho Do、Jacques Simonet、Georges Le Guillanton
DOI:10.1039/c39930000715
日期:——
The electrochemical oxidation of di-tert-butyl disulfide is shown to correspond to a one electron process; at 1.3 V, one carbon–sulfur bond is cleaved yielding two intermediate special : the tret-butyl cation and the radical ButS–S˙; a Ritter reaction occurs with the cation when the sovent is a nitrile and the cation dimerizes in to a tetrasulfide; at a more positive potential (1.9V) the two carbon–sulfur bonds are cleaved giving But+ and sulfur.
From symmetrical tetrasulfides to trisulfide dioxides <i>via</i> photocatalysis
作者:Kai Gong、Yilin Zhou、Xuefeng Jiang
DOI:10.1039/d1gc03242a
日期:——
achieved symmetrical tetrasulfides. Stern–Volmer analysis and radical quenching experiments demonstrated the occurrence of a single electron transfer between the photocatalyst and sulfinic acid. Bioactive molecules such as the antihypertensive drug captopril, allicin derivatives, amino acids and terpenes were efficiently and reversibly linked through sulfur–sulfur covalent bonds. Furthermore, flow-setup syntheses
The Reaction of Sulfur Dioxide with Thiols Catalyzed by Boron Trifluoride Etherate. Evidence for a Possible Intervention of Dithiosulfite as a Reaction Intermediate
作者:Fuminori Akiyama
DOI:10.1246/bcsj.56.2657
日期:1983.9
The reaction of sulfurdioxide (SO2) with 1-propanethiol (NPT), 2-propanethiol (IPT), or 2-methyl-2-propanethiol (TBT) catalyzed by borontrifluoride ethrate (BF3OEt2) was investigated. The ratios of dialkyl trisulfide to dialkyl disulfide obtained (RSSSR/RSSR) at an early stage of the reaction were larger than 1 for the reaction of TBT and less than 1 for the reaction of NPT or IPT. The reaction of
Radical Substitution Provides a Unique Route to Disulfides
作者:Zijun Wu、Derek A. Pratt
DOI:10.1021/jacs.0c03626
日期:2020.6.10
contemporary thermal and photochemical radicalsources could be employed; while photoredox catalysis approaches lead to either oxidation or reduction of the tetrasulfide, energy transfer photocatalysis was particularly useful. The success of the approach is driven by the thermodynamic stability of the perthiyl radicals (RSS•) formed upon substitution on the tetrasulfide; they simply combine under the