Synthesis of tetrasubstituted thiophenes from pyridinium 1,4-zwitterionic thiolates and modified activated alkynes
作者:Taimin Wang、Xuecheng Zhu、Qingqing Tao、Wei Xu、Haiyan Sun、Ping Wu、Bin Cheng、Hongbin Zhai
DOI:10.1016/j.cclet.2021.04.021
日期:2021.12
affording various tetrasubstituted thiophenes with aryl, alkenyl, alkyl, or silyl group at the special position. The structural modification of alkyne substrates enabled the synthesis of diverse thiophenes to be achieved using the pyridinium 1,4-zwitterionic thiolates as the sulfur-containing building blocks. This approach is metal-free and catalyst-free.
吡啶鎓1,4-两性离子硫醇盐与改性的活化炔烃一起用于正式的[3 + 2]环化反应中,得到在特定位置带有芳基,烯基,烷基或甲硅烷基的各种四取代噻吩。炔烃底物的结构改性使得能够使用吡啶鎓1,4-两性离子硫醇盐作为含硫的结构单元来实现多种噻吩的合成。这种方法是无金属且无催化剂的。