The first examples of a Pd-catalyzed carbonylation of aryl boronic acids with sp3 carbon partners are presented. Various boronic acids were shown to react with 1,3-diesters and 1,3-diketones to afford structurally unique carbonyl compounds. By employing 2-substituted 1,3-diesters, synthetically-challenging quaternary carbon centres were accessed. In total, 42 examples of aryl carbonyl compounds were prepared in moderate to good yields. The catalytic system features the use of a bidentated phosphine ligand and a relatively low CO pressure (5 atm), providing an easy, alternative method for the preparation of triketones.
展示了使用Pd催化的芳基
硼酸与sp3
碳伙伴进行羰基化的首个示例。各种
硼酸与1,3-二
酯和1,3-二
酮反应,生成了结构独特的羰基化合物。通过使用2-取代的1,3-二
酯,成功获得了合成上具有挑战性的四级
碳中心。总共合成了42种芳基羰基化合物,产率中等到良好。该催化系统采用了双联
磷配体和相对较低的CO压力(5个大气压),为合成三
酮提供了一种简单的替代方法。