A straightforward reaction sequence consisting of a Sonogashira coupling of protected propargylic amines, a cobalt-catalysed neutral Diels-Alder reaction, DDQ oxidation of the dihydroaromatic intermediate, a sodium borohydride reduction and an acid induced Friedel-Crafts-type cyclisation approach incorporating four simple starting materials leads to polyfunctionalised polycyclic products. Based on the electronic, steric and structural preconditions either seven-membered dibenzoazepine derivatives or alternatively six- or eight-membered isoindoline derivatives are formed.
由受保护
丙炔胺的 Sonogashira 偶联、
钴催化的中性 Diels-Alder 反应、二氢芳香族中间体的
DDQ 氧化、
硼氢化钠还原和酸诱导的 Friedel-Crafts 型环化方法组成的简单反应序列,结合四种简单的起始材料,可生成多官能化的多环产物。根据电子、立体和结构先决条件,可形成七元二苯并氮杂卓衍
生物或六元或八元
异吲哚啉衍
生物。