Reduction of Sulfonic Acids and Related Organosulfur Compounds with Triphenylphosphine–Iodine System
作者:Shigeru Oae、Hideo Togo
DOI:10.1246/bcsj.56.3802
日期:1983.12
excess iodine, however, these aliphatic sulfur compounds are converted eventually to the corresponding alkyliodides. The relativereactivities of these sulfonyl derivatives in the reaction with the triphenylphosphine–iodine system are the following. Aromatic series: ArSO2Cl, ArSO2SAr′>ArSO2H>ArSO3R>ArSO3−HNBu3+ (or PyH+)>ArSO3H>ArSO2SO2Ar>>ArSO2CH2C(CH3)3, ArSO3Ar′. Aliphatic series: RSO2Cl, RSO2SR′,
Selective oxidation of thiols to disulfides (RSSR) was performed by using catalytic amounts of dinitrogentetroxide/charcoal in chloroform at r.t. while the reaction of thiols with four molar equivalents of the reagent in dichloromethane afforded thiosulfonates (RSO2SR) with excellent yields.
Dinitrogen tetroxide supported on polyvinylpyrrolidone (PVP–N2O4): a new nitrosating and coupling agent for thiols and a selective oxidant for sulfides and disulfides
S-nitrosothiols (thionitrites) using this new nitrosatingagent in n-hexane or CHCl3 at 10°C. With this reagent, thiols were also converted into their corresponding disulfides. Selective oxidation of sulfides to sulfoxides and disulfides to thiosulfonates can also be achieved by this reagent at room temperature. By using an excess of the reagent, the selective one-pot synthesis of thiosulfonates from thiols
将气态N 2 O 4固定在聚乙烯吡咯烷酮上,得到稳定的聚合试剂。硫醇转化为小号在使用这个新的亚硝化剂-nitrosothiols(thionitrites)ñ -己烷或氯仿3在10℃下。使用该试剂,硫醇也被转化为其相应的二硫化物。在室温下,也可以通过该试剂将硫化物选择性氧化为亚砜,将二硫化物选择性氧化为硫代磺酸盐。通过使用过量的试剂,在室温下也从硫醇选择性地一锅合成硫代磺酸盐。
Zinc Dichromate Trihydrate (ZnCr2O7×3H2O) as an Efficient Reagent for the One-Pot Synthesis of Thiosulfonates from Thiols
作者:Sara Sobhani、Sima Aryanejad、Mahdi Maleki
DOI:10.1055/s-0030-1259506
日期:2011.2
ZnCr2O7Ë3H2O is a readily available and efficient reagent for the one-pot synthesis of a variety of thiosulfonates by chemoselective oxidation of thiols.
Physical Properties and Various Reactions of Thionitrites and Related Substances
作者:Shigeru Oae、K\={o}ichi Shinhama、Ken Fujimori、Yong Hae Kim
DOI:10.1246/bcsj.53.775
日期:1980.3
Several new sulfonyl or sulfonyl derivativives, thionitrates (RSNO2), sulfonyl nitrites (RSO2NO), were successfully isolated by treating corresponding thiols and sulfinic acids with dinitrogen tetraoxide (N2O4). Spectroscopic data of both stable and many rather unstable compounds were determined and compared with those of corresponding alkyl nitrites (RONO) or alkyl nitrates (RONO2). Chemical reactivities