Iodine-mediated photoinduced tuneable disulfonylation and sulfinylsulfonylation of alkynes with sodium arylsulfinates
作者:Mandapati Bhargava Reddy、Eoghan M. McGarrigle
DOI:10.1039/d3cc02011h
日期:——
disulfonylation and sulfinylsulfonylation of alkynes with sodium arylsulfinates under visible light irradiation has been developed. This photochemical protocol offers broad substrate scope of 1,2-bissulfonylethenes with high functional group tolerance and good yields under mild reaction conditions. In addition, it was found that β-sulfinyl alkenylsulfones can be obtained in the absence of base. It is
Detection d'une activite optique au niveau d'un atome de vanadium a environnement pseudo-teraerique chiral
作者:C. Moise、J. Tirouflet
DOI:10.1016/s0022-328x(00)93436-3
日期:1980.3
CpCp′V are prepared by reduction of the corresponding dichlorides CnCp′VCl2 (Cp = C5H5 ; (Cp′ = C5H4R). Like vanadocene they display a carbenoď behavior and can be coordinated to CS2 and acetylenic compounds. The addition of dissymmetrical acetylenes involve the formation of a chiral center at vanadium. This chirality is detected by partial chromatographic separation of diastereoisomers CpCp″V* (RCCR*)
通过还原相应的二氯化物CnCp'VCl 2(Cp = C 5 H 5;(Cp'= C 5 H 4 R)来制备不对称钒铅烷CpCp'V 。像钒钒烯一样,它们表现出卡宾诺行为,可以与CS 2配位不对称乙炔的添加会在钒上形成一个手性中心,这种手性是通过非对映异构体CpCp''V *(RCCR*)的部分色谱分离来检测的,该非对映异构体在乙炔配体上带有一个第二个手性中心。