作者:Roswitha Böhme、Günther Jung、Eberhard Breitmaier
DOI:10.1002/hlca.200590226
日期:2005.11
amphiphilic natural product with a trisubstituted tetramic acid moiety, was prepared in four steps from D-leucine in an overall yield of 24%. The chiral heterocyclic portion of 1 was synthesized by Dieckmann cyclization of ethyl N-(acetoacetyl)leucinate (7), and the resulting pyrrole derivative 8 was N-acylated with (E)-dec-2-enoyl chloride in the presence of BuLi at − 70° (Scheme 2). This new procedure
(R)-Reutericyclin((R)-1)是具有三取代的四酸部分的杀菌两亲天然产物,它是由D-亮氨酸分四个步骤制备的,总收率为24%。的手性杂环部分1是由合成迪克曼的乙基环化ñ - (乙酰乙酰基)亮氨酸(7),将得到的吡咯衍生物8被Ñ -acylated与(Ë在丁基锂在存在下) -癸-2-烯酰氯− 70°(方案2)。该新方法简单明了,并且可以合成约200个对映体过量(ee)的路透环素的两个对映体。80%。