作者:Chao Li、Zixi Yan、Bingding Wang、Jiaxing Li、Weiping Lyu、Zhixing Wang、Ning Jiao、Song Song
DOI:10.1016/j.chempr.2023.10.015
日期:2024.2
pyridine derivatives. However, this reaction is still unexplored because of the inert property of pyridine and the challenge in the regioselectivity. Herein, we report an aromatic C-4 selective functionalization of pyridine -oxides with DABCO and TfO as the regioselective controller. The commercial availability of reagents, good tolerance of functional groups, and simple operability made it a promising
4-官能化吡啶是各个领域的独特支架。吡啶的 C-4 选择性官能化可能是吡啶衍生物最方便的方案。然而,由于吡啶的惰性和区域选择性的挑战,该反应仍未被探索。在此,我们报道了以 DABCO 和 TfO 作为区域选择性控制器对吡啶氧化物进行芳香族 C-4 选择性官能化。试剂的商业可用性、对官能团的良好耐受性和简单的操作性使其成为一种有前途的 4-官能化吡啶方法。机理研究表明-(4-吡啶基)-DABCO盐是关键中间体,CFSO基团和DABCO的大空间位阻是C-4选择性的根源。该中间体可以作为实现 C-X、C-N、C-O、C-S 和 C-P 键形成的通用句柄。