Functionalization of C–H bonds in acetophenone oximes with arylacetic acids and elemental sulfur
作者:Phuc H. Pham、Khang X. Nguyen、Hoai T. B. Pham、Thien T. Tran、Tung T. Nguyen、Nam T. S. Phan
DOI:10.1039/d0ra00808g
日期:——
coupling of acetophenone ketoximes, arylacetic acids, and elemental sulfur in the presence of Li2CO3 base. Functionalities including chloro, bromo, fluoro, trifluoromethyl, and pyridyl groups were compatible with reaction conditions. High yields and excellent regioselectivities were obtained even if meta-substituted ketoxime acetates were used. Ethyl esters of heteroarylacetic acids were competent substrates
在 Li 2 CO 3碱存在下,通过苯乙酮肟、芳基乙酸和元素硫的偶联合成稠合噻吩并[3,2- d ]噻唑。包括氯、溴、氟、三氟甲基和吡啶基在内的官能团与反应条件相容。即使使用间位取代的酮肟乙酸盐,也可以获得高产率和优异的区域选择性。杂芳基乙酸的乙酯是有效的底物,这在文献中非常罕见。我们的方法将提供一个方便的协议,从简单的底物提供多杂环结构。