Exceedingly Fast, Direct Access to Dihydroisoquinolino[1,2-<i>b</i>]quinazolinones through a Ruthenium(II)-Catalyzed Redox-Neutral C–H Allylation/Hydroamination Cascade
作者:Gurupada Bairy、Suvankar Das、Hasina Mamataj Begam、Ranjan Jana
DOI:10.1021/acs.orglett.8b03048
日期:2018.11.16
A ruthenium(II)-catalyzed redox-neutral synthesis of dihydroisoquinoline-fused quinazolinone derivatives has been accomplished through the merger of C–H activation and alkene difunctionalization using quinazolinone as an inherent directing group. This intermolecular reaction proceeds rapidly and is complete within 10 min, providing the annulation product in high yields without any stoichiometric metal
钌(II)催化的二氢异喹啉稠合的喹唑啉酮衍生物的氧化还原中性合成是通过使用喹唑啉酮作为固有引导基团的CH活化和烯烃双官能团的合并完成的。该分子间反应迅速进行,并在10分钟内完成,从而提供了高收率的成环产物,而没有任何化学计量的金属氧化剂。从机理上讲,这种串联反应是通过直接的邻位CH烯丙基化,然后与近端的-CONH基团进行加氢胺化反应,得到6-甲基-5,6-二氢-8 H-异喹啉基[1,2 - b ]喹唑啉-8-一个操作即可完成。羧酸添加剂在活性催化剂的形成和原金属的脱金属中具有双重作用。