Diverse privileged <i>N</i>-polycyclic skeletons accessed from a metal-free cascade cyclization reaction
作者:Wenzhong Li、Yu Wang、Huijing Qi、Ran Shi、Jiazhu Li、Si Chen、Xin-Ming Xu、Wei-Li Wang
DOI:10.1039/d1ob01206a
日期:——
An exquisite metal-free cascade cyclizationreaction of 2-acylbenzoic acids with amines was developed, which provided a powerful method for the one-potsynthesis of diverse isoindoloisoquinoline and benzoindolizinoindole derivatives. This protocol avoided the use of metal catalysts, proceeded with high efficiency and had broad substrate scope. These resulting products could be transformed into tertiary
Parham-type cyclization and nucleophilic addition - N-acyliminium ion cyclization sequences for the construction of the isoquinoline nucleus
作者:M.Isabel Collado、Nuria Sotomayor、María-Jesús Villa、Esther Lete
DOI:10.1016/0040-4039(96)01321-4
日期:1996.8
Efficient methodologies based on the nucleophilic addition-N-acyliminium ioncyclization and the Parham-typecyclizationsequences of N-phenethylimides 1 and 2 are reported for the synthesis of a variety of heterocyclic systems: benzo[a]quinolizidones and their 2-oxa analogs, isoindoloisoquinolones, dibenzo[a,h]quinolizidones, thiazolo-, oxazolo-, and imidazolo [4,3-a]isoquinolones.