作者:Dahye Kang、Sungwoo Hong
DOI:10.1021/acs.orglett.5b00641
日期:2015.4.17
C2- and C5-alkynylated quinolone scaffolds are core structures of numerous biologically active molecules. Utilizing TIPS-EBX as an alkynylating agent, we have developed an efficient and site-selective C5 alkynylation of 4-quinolones that is directed by the weakly coordinating carbonyl group. In addition, Ru(II) catalyzed C2-selective alkynylation was successfully realized via N-pyrimidyl group-directed
C2-和C5-炔基化喹诺酮骨架是众多生物活性分子的核心结构。利用TIPS-EBX作为烷基化剂,我们开发了由弱配位羰基控制的4-喹诺酮类的高效,位点选择性C5烷基化反应。此外,Ru(II)催化的C2选择性炔基化是通过N-嘧啶基定向的交叉偶联成功实现的,以访问有价值的C2炔基化的4-喹诺酮类。此策略可直接访问C2或C5炔基化4-喹诺酮类药物。此外,该反应被用于异喹诺酮以进行C 3-选择性炔基化。