作者:Ghayoor Chotana、Soneela Asghar、Tayyaba Shahzadi、Meshari Alazmi、Xin Gao、Abdul-Hamid Emwas、Rahman Saleem、Farhat Batool
DOI:10.1055/s-0036-1591968
日期:2018.6
presence of a directing group or pre-functionalization. In this paper, the preparation of biarylboronic esters by direct C–H borylation of biaryl substrates is reported. Sterically governed regioselectivities were observed in the borylation of appropriately substituted biaryls by using [Ir(OMe)(COD)]2 precatalyst and di-tert-butylbipyridyl ligand. The resulting biarylboronic esters were isolated in 38–98%
摘要 Biarylboronic酯通常通过定向制备邻-metalation或由宫浦硼化并且因此依赖于定向基团的存在或预官能化。在本文中,报道了通过直接对联芳基底物进行C–H硼化来制备联芳基硼酸酯。通过使用[Ir(OMe)(COD)] 2预催化剂和二叔丁基联吡啶基配体,在适当取代的联芳基的硼酸酯化中观察到了立体控制的区域选择性。分离得到的联芳基硼酸酯,收率为38–98%。合成的联芳基硼酸酯进一步成功用于C-O,C-Br和C-C偶联反应。 Biarylboronic酯通常通过定向制备邻-metalation或由宫浦硼化并且因此依赖于定向基团的存在或预官能化。在本文中,报道了通过直接对联芳基底物进行C–H硼化来制备联芳基硼酸酯。通过使用[Ir(OMe)(COD)] 2预催化剂和二叔丁基联吡啶基配体,在适当取代的联芳基的硼酸酯化中观察到了立体控制的区域选择性。分离得到的联芳基硼酸酯,收率为38–9