construction of polysubstituted five-membered heterocycles via TMSOTf-catalyzed formal [3+2] cycloaddition of electron-rich alkynes, which features free from any metal, atom economy and water as the main by-product. Furthermore, alkenyl ether adduct has been verified as the key intermediate. Notably, by utilizing this approach, we can synthesize a broad range of polysubstituted furans, thiophenes and pyrroles
我们提出了一种通过TMSOTf 催化的富电子
炔烃的正式 [3+2] 环加成来构建多取代五元杂环的合成方案,其特点是不含任何
金属、原子经济性和
水作为主要副产品。此外,烯基醚加合物已被证实为关键中间体。值得注意的是,通过利用这种方法,我们可以合成范围广泛的多取代
呋喃、
噻吩和
吡咯,并将这种转化扩展到提供稠合聚杂环。该反应可以在克规模上实现,相应的产品是用于生产多种潜在有用支架的中间体。