Thiolate-Initiated Synthesis of Dibenzothiophenes from 2,2′-Bis(methylthio)-1,1′-Biaryl Derivatives through Cleavage of Two Carbon–Sulfur Bonds
作者:Yoshihiro Masuya、Yuki Kawashima、Takuya Kodama、Naoto Chatani、Mamoru Tobisu
DOI:10.1055/s-0037-1611974
日期:2019.10
A catalytic reaction involving the cleavage of two carbon–sulfur bonds in 2,2′-bis(methylthio)-1,1′-biaryl derivatives is reported. This reaction does not require a transition-metal catalyst and is promoted by a thiolate anion. Notably, based on DFT calculations, the product-forming cyclization step is shown to proceed through a concerted nucleophilic aromatic substitution (CSNAr) mechanism.
报道了涉及裂解 2,2'-双(甲硫基)-1,1'-联芳基衍生物中的两个碳-硫键的催化反应。该反应不需要过渡金属催化剂,并由硫醇盐阴离子促进。值得注意的是,根据 DFT 计算,形成产物的环化步骤显示出通过协同的亲核芳香取代 (CSNAr) 机制进行。