time-efficient preparation of a variety of functionalized aromatic heterocyclic products exhibiting an isoquinoline core. The approach is based on the normal electron-demand [4 + 2] aza-Diels–Alder cycloaddition of electron-rich N-aryl imines with arynes. Using this strategy, an expeditious total synthesis of the naturally occurring benzo[c]phenanthridinealkaloid nornitidine was achieved.
已经开发了两个级联反应,以高效地制备具有异喹啉核心的各种功能化芳族杂环产物。该方法基于富电子的N-芳基亚胺与芳烃的正常电子需求[4 + 2] aza-Diels-Alder环加成反应。使用该策略,可以快速合成天然存在的苯并[ c ]菲啶生物碱去甲替尼丁。
Studies on Heterocyclic Chemistry. XX. Photo-reactions of 5-Benzylideneamino-3-arylisoxazoles in Trialkylamine
作者:Tarozaemon Nishiwaki
DOI:10.1246/bcsj.49.3339
日期:1976.11
Irradiation of 5-benzylideneamino-3-arylisoxazoles at 254 nm in a mixture of trialkylamine and nitrile gives diaminoethanes (reduction), benzamides (oxidation), and isoxazolo[5,4-b]pyridine (cyclization).