A short, flexible route for the synthesis of the title indolopyridine alkaloids consisting of the cyclization of enamide 3, followed by introduction of the requisite pyridine substituent by Pd0-catalysed reactions from the resulting pentacyclic bromo intermediate 4 is reported.
报道了一条简短且具有灵活性的合成途径,用于制备标题中的
吲哚并
吡啶生物碱,该途径包括烯酰胺3的环化反应,随后通过
钯催化反应从得到的五环
溴代中间体4引入必要的
吡啶取代基。