Pd-Catalyzed Autotandem Reactions with <i>N</i>-Tosylhydrazones. Synthesis of Condensed Carbo- and Heterocycles by Formation of a C–C Single Bond and a C═C Double Bond on the Same Carbon Atom
作者:Miguel Paraja、Carlos Valdés
DOI:10.1021/acs.orglett.7b00613
日期:2017.4.21
A new Pd-catalyzed autotandem reaction is introduced that consists of the cross-coupling of a benzyl bromide with a N-tosylhydrazone followed by an intramolecular Heck reaction with an aryl bromide. During the process, a single and a double C–C bond are formed on the same carbon atom. Two different arrangements for the reactive functional groups are possible, rendering great flexibility to the transformation
引入了新的钯催化的自动串联反应,该反应包括苄基溴与N-甲苯磺酰the的交叉偶联,然后与芳基溴的分子内Heck反应。在此过程中,同一碳原子上会形成一个单键和一个双键。反应性官能团的两种不同布置是可能的,从而为转化提供了极大的灵活性。相同的策略产生9-亚甲基-9 H-芴,9-亚甲基-9 H-黄嘌呤,9-亚甲基-9,10-二氢ac啶,以及二氢吡咯并异喹啉和二氢吲哚异喹啉衍生物。