(±)-pseudoconhydrine, (±)-N-methylpseudoconhydrine, (−)-5-hydroxysedamine, and (+)-sedacryptine were synthesized. Successive functionalization of the piperidine ring via anodic methoxylation allowed the regio- and stereoselective introduction of the substituents. The α and α′ substituents were introduced by application of the sequence elimination–nucleophilic addition from 2- or 2,5-substituted 6-methoxycarbamates
合成了 β-羟基
哌啶生物碱 (±)-pseudoconhydrine、(±)-N-methylpseudoconhydrine、(-)-5-hydroxysedamine 和 (+)-sedacryptine。通过阳极甲氧基化对
哌啶环进行连续功能化,可以区域选择性和立体选择性地引入取代基。α 和 α' 取代基是通过应用 2- 或 2,5- 取代的 6-甲氧基
氨基甲酸酯的序列消除 - 亲核加成引入的。
硼氢化 - 烯
氨基甲酸酯的氧化,通过从 α-甲氧基
氨基甲酸酯中消除
甲醇获得,允许引入 β-羟基官能团。关键词:
生物碱,景天,N-acyliminium,烯
氨基甲酸酯。