S-烷基,S-芳基和S-乙烯基硫代硫酸钠盐(Bunte盐)与Grignard试剂反应生成硫化物,收率很高。S-烷基邦特盐是由无味的硫代硫酸钠通过与烷基卤化物的S N 2反应制备的。开发了铜催化的硫代硫酸钠与芳基卤化物和乙烯基卤化物的偶联物,以得到S-芳基和S-乙烯基丁烯酸盐。该反应适合于多种结构的邦特盐和格氏试剂。重要的是,这种硫化物的途径避免了使用恶臭的硫醇原料或副产物。
and PhS− ions. Whereas 4a gave only SN2 products, 4b gave SN2 and E2C products typical of SN2/E2C competition. Among the salts 5a–c displacement of the benzylgroup was dominant (5a) or exclusive (5b, c), thus exhibiting the preferential displacement of a benzylgroup that has been fully documented in earlier studies of SN2 reactions. Qualitative comparison showed that 3a (methyl) reacted much faster
Syntheses of Sulfides and Selenides through Direct Oxidative Functionalization of C(sp<sup>3</sup>)–H Bond
作者:Bingnan Du、Bo Jin、Peipei Sun
DOI:10.1021/ol5011449
日期:2014.6.6
functionalization of the C(sp3)–H bond of alkanes under metal-free conditions was developed. Using tBuOOtBu as the oxidant, the reaction of disulfides or diselenides with alkanes gave sulfides or selenides in moderate to good yields. The method was very simple and atom-economical.
通过在无金属条件下对烷烃的C(sp 3)-H键进行直接官能化,开发了一种C-S和C-Se键形成的新方案。使用t BuOO t Bu作为氧化剂,二硫化物或二硒化物与烷烃的反应以中等至良好的收率得到硫化物或硒化物。该方法非常简单且原子经济。
Metal-Free Preparation of Cycloalkyl Aryl Sulfides<i>via</i>Di-<i>tert</i>-butyl Peroxide-Promoted Oxidative C(<i>sp</i><sup>3</sup>)H Bond Thiolation of Cycloalkanes
作者:Jincan Zhao、Hong Fang、Jianlin Han、Yi Pan、Guigen Li
DOI:10.1002/adsc.201400032
日期:2014.8.11
A concise thiolation of C(sp3)-Hbond of cycloalkanes with diaryl disulfides in the presence of oxidant of di-tert-butylperoxide (DTBP) has been developed. This reaction without using any of metal catalyst, tolerates varieties of disulfides and cycloalkanes substrates, giving good to excellent chemical yields, which provides a useful approach to cycloalkyl aryl sulfides from unactivated cycloalkanes
A comparative study of Cu(II)-assisted vs Cu(II)-free chalcogenation on benzyl and 2°/3°-cycloalkyl moieties
作者:SANTOSH K SAHOO
DOI:10.1007/s12039-015-0981-0
日期:2015.12
A relative synthetic strategy toward intermolecular oxidative C −Chalcogen bond formation of alkanes has been illustrated using both Cu(II) assisted vs Cu(II) free conditions. This led to construction of a comparative study of hydrocarbon benzylic and 2∘/ 3∘-cycloalkyl moieties bond sulfenylation and selenation protocol by the chalcogen sources, particularly sulfur and selenium, respectively. In addition, this protocol disclosed the auspicious formation of sp3 C−S coupling products over leading the sp3 C−N coupling products by using 2-mercaptobenzothiazole (MBT) substrates.
cycloalkanes with alkylarylsulfinates has been performed. Using iodine as the catalyst, through C −H bond activation and sulfinates reduction, a wide range of thioethers were produced in moderate to high yields. Additionally, various thiocarboxylic esters can also be produced by simply performing the reaction under CO pressure. Notably, this is the first report in which alkylarylsulfinates were used as