作者:Lukas V. Hoff、Simon D. Schnell、Andrea Tomio、Anthony Linden、Karl Gademann
DOI:10.1021/acs.orglett.1c01813
日期:2021.8.6
A Ag-mediated Pd-catalyzed cross-coupling method for 3-bromo-1,2,4,5-tetrazine with boronic acids is presented. Electronic modification of the 1,1′-bis(diphenylphosphine)ferrocene (dppf) ligand was found to be crucial for good turnover. Using this fast method, a variety of alkyl-, heteroatom-, and halide-substituted aryl- and heteroaryl-tetrazines were prepared (29 examples, up to 87% yield).
提出了一种用于 3-溴-1,2,4,5-四嗪与硼酸的 Ag 介导的 Pd 催化交叉偶联方法。发现 1,1'-双(二苯基膦)二茂铁 (dppf) 配体的电子修饰对于良好的周转至关重要。使用这种快速方法,制备了多种烷基、杂原子和卤化物取代的芳基和杂芳基四嗪(29 个实例,产率高达 87%)。