The Syntheses of Cyclic Spermine Alkaloids: Analogues of Buchnerine and Budmunchiamine C
作者:Yi Li、Manfred Hesse
DOI:10.1002/hlca.200390033
日期:2003.2
The syntheses of two macrocyclic spermine alkaloids, analogues 1 and 2 of budmunchiamine C and buchnerine, in which N,N′-bis(2-aminoethyl)hexane-1,6-diamine (PA 262; 4) replaces spermine as polyamine backbone, were accomplished by two different methods. The first synthetic approach was based on a metal-template intramolecular amidation of tetraamino esters prepared from a Michael addition of protected
合成两个大环精胺生物碱,布孟奇胺C和布氏碱的类似物1和2,其中N,N'-双(2-氨基乙基)己烷-1,6-二胺(PA 262; 4)取代精胺作为多胺骨架,是通过两种不同的方法完成的。第一种合成方法是基于金属模板分子内酰胺化四氨基酯,该四氨基酯由分别将受保护的PA 262 10迈克尔加成至十六烷基-2-壬酸乙酯(12)和丙-2-炔酸乙酯17制备而成(参见方案4)。和5,分别)。连续迈克尔在第二种合成方法中,将乙烷-1,2-二胺添加到不饱和酯中并进行氨解以制备前体23和24(方案6)。然后通过在DMF中以Cs 2 CO 3为催化剂的磺酰胺基衍生物25和26的大环化来构建大环内酰胺。