Palladium-Catalyzed Synthesis of Aryl Vinyl Sulfides via 1,3-Oxathiolanes As Vinyl Sulfide Surrogates
作者:Jason R. Schmink、Summer A. Baker Dockrey、Tianyi Zhang、Naomi Chebet、Alexis van Venrooy、Mary Sexton、Sarah I. Lew、Steffany Chou、Ami Okazaki
DOI:10.1021/acs.orglett.6b03249
日期:2016.12.16
A nontraditional approach to synthesizing aryl vinyl sulfides is described. 2,2-Diphenyl-1,3-oxathiolane slowly liberates a vinyl sulfide anion under basic conditions. Using a Pd/Xantphos catalyst system to activate a wide range of aryl bromides, this transient sulfide species can be effectively trapped and fed into a traditional Pd0/PdII catalytic cycle. Scope and limitations of the methodology are
描述了一种非传统的合成芳基乙烯基硫化物的方法。在碱性条件下,2,2-二苯基-1,3-氧杂硫杂环戊烷缓慢释放出乙烯基硫化物阴离子。使用Pd / Xantphos催化剂体系活化多种芳基溴化物,可以有效地捕集这种瞬态硫化物,并将其送入传统的Pd 0 / Pd II催化循环中。提出了该方法的范围和局限性,并对该催化剂体系具有竞争性的C–S键活化进行了重要讨论。