A Facile Synthetic Method of ABCD Ring System of Antitumor Alkaloid Camptothecin via Intramolecular Hetero Diels-Alder Reaction
作者:Masataka Ihara、Masahiro Toyota、Chiyo Komori
DOI:10.3987/com-99-s109
日期:——
A Concise Formal Total Synthesis of Mappicine and Nothapodytine B via an Intramolecular Hetero Diels−Alder Reaction
作者:Masahiro Toyota、Chiyo Komori、Masataka Ihara
DOI:10.1021/jo000816i
日期:2000.10.1
A six-step formaltotalsynthesis of a natural alkaloid, mappicine (3), has been achieved. The highlight of our synthetic strategy is an intramolecular hetero Diels-Alderreaction that was used for the construction of the CD ring system of mappicine (3). In addition, it was demonstrated that the Sonogashira coupling reaction of 2-chloro-3-hydroxymethylquinoline (8c) with trimethylsilylacetylene proceeded