申请人:Crich David
公开号:US20100222549A1
公开(公告)日:2010-09-02
A dechalcogenative method for the preparation of an allylic sulfide comprises contacting an activated chalcogenide of Formula (I) with a thiol of Formula (II) for a period of time sufficient to form an intermediate of Formula (III), and supplying sufficient activation energy to the intermediate of Formula (III), in a suitable solvent, preferably in the absence of a phosphine or other thiophile, to induce a [2,3]-sigmatropic rearrangement therein to form an allylic sulfide of Formula (IV), with concomitant loss of chalcogen Z, as set forth in the following reaction scheme, wherein X is an activating group selected from the group consisting of CN, S-pyridyl, S-heteroaryl, SO2-aryl, and SO3Y; Y is an alkali metal ion; Z is Se or S; R1, R2, R3, R4, and R5 are each independently H or a hydrocarbon moiety; and R is an organic moiety.
一种去硫代化的方法,用于制备烯丙基硫醚,包括将式(I)激活的硫族元素与式(II)的硫醇接触一段足够的时间,以形成式(III)的中间体,并向该中间体提供足够的激活能量,在适当的溶剂中,优选地在缺少膦或其他硫亲和性试剂的情况下,诱导[2,3]-sigmatropic重排反应,以形成式(IV)的烯丙基硫醚,同时失去硫族元素Z,如下反应方程所示,其中X是从CN、S-吡啶基、S-杂环基、SO2-芳基和SO3Y等组中选择的活化基团;Y是碱金属离子;Z是Se或S;R1、R2、R3、R4和R5各自独立地是氢或碳氢基团;R是有机基团。