已开发出一种无过渡金属的合成方法,该方法用于在室温条件下通过使用过硫酸钾,在氧化条件下由二芳基二卤化锑和芳烃合成不对称的二芳基硫属元素化物(S,Se和Te)。各种取代的芳烃,例如苯甲醚,硫代苯甲醚,二苯醚,苯酚,萘酚,二和三甲氧基苯,二甲苯,均三甲苯,N,N-二甲基苯胺,溴取代的芳烃,萘和二芳基二卤化碳经历了碳硫族键形成反应在三氟乙酸中生成不对称的二芳基硫属元素化物。为了理解反应的机理部分,由77进行了详细的中间体原位表征通过使用二苯基二硒化物为底物进行Se NMR光谱分析。77 Se NMR研究表明,亲电子物质ArE +是由二芳基二卤化二硫化物与过硫酸盐在三氟乙酸中反应生成的。芳基硫属元素离子对芳烃的亲电攻击可能是芳基-硫属元素键形成的原因。
An efficient and conceptually new protocol for C–Secrosscoupling of potassium selenocyanate with arylhalides via copper-catalyzed cascade reaction has been developed in water. Utilizing this protocol, a variety of aryl and heteroaryl halides were reacted with potassium selenocyanate to afford the corresponding diaryl selenides in moderate to good yields.
“Selenium Polonovski Reaction” Using Benzeneselenenyl Triflate
作者:Renji Okazaki、Yukinori Itoh
DOI:10.1246/cl.1987.1575
日期:1987.8.5
Selenoxyammonium salts prepared from tertiary amine N-oxides and benzeneselenenyltriflate undergo rearrangement in the presence of triethylamine or DBU to give α-selenoxyamines, which react in situ with an electrophile or nucleophile to afford new secondary or tertiary amine derivatives.
Studies on Long-range Couplings between<sup>77</sup>Se and<sup>13</sup>C in Some Aryl Selenides, Dichlorides, and Selenoxides. The Inverse Effect on Couplings in the Selenoxide Formation
作者:War\={o} Nakanishi、Yoshitsugu Ikeda
DOI:10.1246/bcsj.56.1661
日期:1983.6
Long-range coupling constants between 77Se and 13C in selenoanisole, diphenyl selenide, diphenyl diselenide, and their 2-mono- and 2,2′-disubstituted derivatives, selenoxanthone, selenanthrene, dichlorides, and selenoxides were measured to disclose predominant factors governing the magnitude of the coupling. Extraordinary large values for two- and three-bond couplings are found in selenoxanthone. Three factors are operative: the orientational effect, the coordination number, and the effect of ring formation. The last factor accompanies a stronger inverse effect on the coupling of selenoxides than on that of selenides.
adducts of chlorine with diaryl selenides such as selenanthrene, diphenyl selenide, and selenoxanthone have been found to be reduced to the corresponding selenides in dimethyl sulfoxide forming chloromethyl methyl sulfoxide and hydrogen chloride. Similarly, dimethyl selenide dichloride was reduced to dimethyl selenide in the presence of a base.