Simple total syntheses of two Leucetta-derived marine alkaloids have been developed using position-specific halogen-metal exchange of polyhaloimidazoles to introduce the benzyl substituted sidechains. Introduction of the C2 amine group by lithiation and trapping with tosyl azide provides amines on catalytic hydrogenation, which can be converted to naamidine G and 14-methoxynaamidine G using a procedure
两种Leucetta衍生的海洋
生物碱的简单全合成已经使用多卤
咪唑的位置特异性卤素
金属交换来引入苄基取代的侧链。通过
锂化作用引入 C2 胺基团并用
甲苯磺酰
叠氮化物捕获,在催化氢化作用下提供胺,可使用文献中描述的程序将其转化为
萘脒 G 和 14-甲氧基
萘脒 G。