A convenient strategy for synthesizing the Agelas alkaloids clathrodin, oroidin, and hymenidin and their (un)saturated linker analogs
作者:Aleš Žula、Danijel Kikelj、Janez Ilaš
DOI:10.1016/j.tetlet.2014.05.087
日期:2014.7
pathways starting from l-ornithine and benzyl 1,2-dihydropyridine-1-carboxylate respectively, using (i) an innovative combination of Weinreb amide strategy with di-Boc protection, and (ii) a modified pyridine-1(2H)-carboxylate based strategy. Convenient access to these 2-aminoimidazole amines is crucial for the synthesis of libraries of clathrodin, oroidin, and hymenidin analogs.
描述了一种可扩展的合成策略,该策略用于可扩展合成来自海洋Agelas物种及其拥有饱和或不饱和连接子部分的2-氨基咪唑生物碱,clathrodin,oroidin和hymenidin 。关键中间体4-(3-氨基丙基)-1 H-咪唑-2-胺和(E)-4-(3-氨基丙-1-烯-1-基)-1 H-咪唑-2-胺为(i)Weinreb酰胺策略与di-Boc保护的创新结合,以及(ii)修饰的吡啶-1,通过两种不同的合成途径分别从1-鸟氨酸和1,2-二氢吡啶-1-甲酸苄酯开始(2小时)-基于羧酸盐的策略。方便地使用这些2-氨基咪唑胺对于合成clathrodin,oroidin和hymenidin类似物的库至关重要。