short and simple routes. The prenyl group was selectively introduced at the C4 position using a Stille coupling reaction in the synthesis of ekeberginine. Murrayaquinone A was synthesized using Raney nickel–mediated desulfurization of dithiane as a key step. Synthesis of glycozoline was achieved in two steps from 3-methyl carbazole via an intermediate 3-bromo-6-methyl carbazole. GRAPHICAL ABSTRACT
摘要 三种不同取代的、天然存在的、具有
生物活性的
咔唑衍
生物(即 ekeberginine、murrayaquinone A 和 glycozoline)使用短而简单的路线以良好的收率合成。在 ekeberginine 的合成中,使用 Stille 偶联反应在 C4 位置选择性地引入
异戊二烯基。Murrayaquinone A 是使用雷尼
镍介导的二噻烷脱
硫作为关键步骤合成的。从
3-甲基咔唑到中间体 3-溴-6-甲基
咔唑,分两步合成糖唑啉。图形概要