Hitherto unknown bis(arylsuphonyl)acetylenes 1 have been prepared via dimethyldioxirane oxidation of the corresponding sulphide; the acetylenes exhibit high reactivity in Diels-Alder and Michael reactions.
synthesis of a vast variety of heteroatom‐containing cyclobutene‐triflones [bis(trifluoromethylsulfonyl)cyclobutenes] and cyclobutenones has been developed starting from heteroatom‐substituted alkynes and a pyridinium salt (a latent Tf2C=CH2 source). This powerful methodology, involving cyclization reactions, allows for the selective preparation of oxygen‐, nitrogen‐, bromine‐, chlorine‐, iodine‐, sulfur‐
从杂原子取代的炔烃和吡啶鎓盐(潜在的Tf 2 C = CH 2来源)开始,开发了可控制的无金属合成各种杂原子的环丁烯-triflones [双(三氟甲基磺酰基)环丁烯]和环丁烯酮。。这种强大的方法涉及环化反应,可以选择性地制备氧,氮,溴,氯,碘,硫,硒,碲,磷和硅官能化的环丁烯衍生物。
作者:Christoph Benisch、Rolf Gleiter、Tobias H Staeb、Bernhard Nuber、Thomas Oeser、Hans Pritzkow、Frank Rominger
DOI:10.1016/s0022-328x(01)01364-x
日期:2002.1
Various substituted (R=H, CH3, SiMe3, CO2Me, COCH3, EtMe4) (R-η5-cyclopentadienyl)[η2-bis(tert-butylsulfonyl)acetylene](carbonyl)cobalt complexes (8–13) proved to be very reactive towards alkynes under rather mild conditions. Dithiaacetylenes reacted at room temperature, dialkyl- and diarylalkynes had to be heated to 80–90 °C to yield the corresponding R-CpCo-stabilized cyclobutadiene complexes 18–37
Facile 1,1-Carboboration Reactions of Acetylenic Thioethers
作者:Christina Eller、Gerald Kehr、Constantin G. Daniliuc、Roland Fröhlich、Gerhard Erker
DOI:10.1021/om400016t
日期:2013.1.28
The acetylenic thioether PhSC≡CSPh undergoes a rapid 1,1-carboboration reaction with facile −SPh migration upon treatment with B(C6F5)3 to yield the borylated ketene dithioacetal product (PhS)2C═C(C6F5)B(C6F5)2 (8a). The X-ray crystal structure analysis revealed an intramolecular sulfur–boron contact. The thioether PhC≡CSPh undergoes an analogous 1,1-carboboration reaction with B(C6F5)3. The resulting
炔硫醚PhSC≡CSPh经历与容易-SPh迁移快速1,1- carboboration反应处理后与B(C 6 ˚F 5)3,得到borylated烯酮二硫缩醛产物(PHS)2 C = C(C 6 ˚F 5)B(C 6 F 5)2(8a)。X射线晶体结构分析表明分子内有硫-硼接触。硫醚PhC≡CSPh与B(C 6 F 5)3进行类似的1,1-碳化反应。所得的邻近的S / B失意的Lewis对在末端乙炔上进行1,2-加成反应,得到相应的两性离子六元杂环sulf /硼酸酯产品(所有三个示例均通过X射线衍射表征)。
Solvolytically DMSO-promoted reactions of 1,1,1-trifluoroethyl chloride (HCFC-133a) or fluoride (HFC-134a) with nucleophiles
作者:Kai Wu、Qing-Yun Chen
DOI:10.1016/s0040-4020(02)00257-0
日期:2002.5
Fluorinated gases HCFC-133a (CF3CH2Cl, bp=6°C) and HFC-134a (CF3CH2F, bp=−27°C) are found highly soluble in DMSO. In their DMSO solutions, oxygen-, nitrogen- and sulfur-nucleophilic reactions may occur in normal glassware rather than in the autoclave.