Regioselective Alkylation of Heteroaromatic Compounds with 3-Methyl-2-Quinonyl Boronic Acids
作者:Marcos Veguillas、María Ribagorda、M. Carmen Carreño
DOI:10.1021/ol1028964
日期:2011.2.18
heteroaromatic compounds with 3-methyl substituted 2-quinonyl boronic acids proceeded by 1,4-addition followed by spontaneous protodeboronation, leading directly to the Friedel−Crafts alkylation products instead of the commonly observed alkenylation derivatives resulting from quinones. The boronic acid acts as a temporary regiocontroller, making the system a highly reactive quinone equivalent and opening a
杂芳族化合物与3-甲基取代的2-喹啉基硼酸的反应是通过1,4-加成,然后是自发的原去硼硼烷,直接导致Friedel-Crafts烷基化产物,而不是通常由醌产生的烯基化衍生物。硼酸起着暂时的区域调节剂的作用,使该系统具有高反应性的醌当量,并可以直接进入5,5-二取代的环己烯-1,4-二酮。