作者:James A. Marshall、Arnaud Piettre、Mikell A. Paige、Frederick Valeriote
DOI:10.1021/jo026433x
日期:2003.3.1
A-G, is described. The approach employs a central core aldehyde segment, C, to which are appended an aliphatic terminus, A or B, a spacer subunit, D or E, and a butenolide terminus, F or G. Coupling of the A, B, D, and E segments to the core aldehyde unit is effected by highly diastereoselective additions of enantiopure allylic indium or tin reagents. The butenolide termini are attached to the ACD
描述了通过七个基本亚基AG的模块化方法,合成了四种无丙酮产乙酸素,阿斯米诺星,阿斯米星,阿斯米星和布兰宁。该方法采用中央核心醛链段C,脂肪链末端A或B,间隔物亚基D或E和丁烯内酯末端F或G附加在中央醛基链段上。A,B,D和C的偶联通过对映体纯的烯丙基铟或锡试剂的高度非对映选择性添加来实现核心醛单元的E链段。丁烯内酯末端通过Sonogashira偶联连接到ACD,BCE或BCD中间体。核心,间隔子和末端亚基的设计使得可以制备任何C30,C10或C4天然产乙酸原素或其立体异构体。发现上述四种乙酸原素对H-116人结肠癌细胞的IC50值在10(-3)至10(-4)microM范围内。IC90的活动约为。10(-3)microM的asimicin和asimin,但仅0.1-1 microM的Bullanin和asiminocin。