Binuclear manganese complexes as catalysts in the selective and efficient oxidation of sulfides to sulfones
作者:Derek H.R. Barton、Wenge Li、Jason A. Smith
DOI:10.1016/s0040-4039(98)01518-4
日期:1998.9
The binuclear MnIVMnIV manganese complex 1 catalyzes the periodic acid oxidation of sulfides to sulfones under mild conditions. The reaction was found to be highly selective giving almost quantitative yields of the sulfones even in the presence other easily oxidized groups. Only amines were found to hinder the reaction.
在温和条件下,双核Mn IV complexMn IV锰络合物1催化硫化物的高碘酸氧化为砜。发现该反应是高度选择性的,即使在存在其他易于氧化的基团的情况下,也给出了几乎定量的砜收率。仅发现胺会阻碍反应。
Catalytic Activation of Diazo Compounds Using Electron-Rich, Defined Iron Complexes for Carbene-Transfer Reactions
作者:Michael S. Holzwarth、Isabel Alt、Bernd Plietker
DOI:10.1002/anie.201201409
日期:2012.5.29
transfer: The electron‐rich iron complex Bu4N[Fe(CO)3(NO)] efficientlycatalyzes different carbene‐transfer reactions. Various diazo compounds can be used. The high stability of the employed iron complexes is demonstrated by the generation of the diazo reagent in situ and a sequential iron‐catalyzed allylic sulfenylation/Doyle–Kirmse reaction.
碳转移:富电子的铁络合物Bu 4 N [Fe(CO)3(NO)]有效催化不同的卡宾转移反应。可以使用各种重氮化合物。重氮试剂的原位生成和连续的铁催化的烯丙基亚磺酰化/道尔-柯尔姆斯反应证明了所用铁配合物的高稳定性。
Formation Mechanism of Furfuryl Sulfides from O-Furfuryl Dithiocarbonates: Density Functional Theory Study for Aromatic [3,3]-Sigmatropic Rearrangement
dithiocarbonate (1) undergoes aromatic [3,3]-sigmatropic rearrangement to the energetically unfavorable S-(2-methylene-2,3-dihydrofuran-3-yl) S-alkyl dithiocarbonate (2'), which then rearranges to furfuryl alkyl sulfide (3) with COS extrusion to regain the aromaticity lost in the first step.
Highly efficient and general Ir-catalyzed hydrosilylation of unactivated alkenes with excellent anti-Markovnikov regioselectivity was described. A broad scope of hydrosilylated products were synthesized economically and conveniently from commercially or naturally available compounds, which provides versatile valuable precursors for organic and medicinal studies.
Structural effects on intramolecular furan cycloadditions