Synthesis and Growth Inhibitory Activity of Chiral 5-Hydroxy-2-<i>N</i>-Acyl-(3<i>E</i>)-Sphingenines: Ceramides with an Unusual Sphingoid Backbone
作者:Jiong Chun、Hoe-Sup Byun、Gilbert Arthur、Robert Bittman
DOI:10.1021/jo026242u
日期:2003.1.1
identified in the hydrolysate of brain sphingolipids more than 40 years ago. We present here the first synthesis of the 5R and 5S diastereoisomers of the N-acyl derivatives of 5-hydroxy-3-sphingenine, 2 and 3, respectively, which represent regioisomers of (2S,3R)-ceramide (1). The key steps include the synthesis of alpha,beta-unsaturated ketone intermediates 4 and 5 from N-Cbz- and N-Boc-l-serine and diastereoselective
40多年前,在脑鞘脂的水解产物中发现了异常的鞘氨醇5-羟基-3-鞘氨醇。我们在这里介绍了分别代表5(2S,3R)-神经酰胺(1)的区域异构体的5-羟基-3-鞘氨醇的N-酰基衍生物的5R和5S非对映异构体的首次合成。关键步骤包括由N-Cbz-和N-Boc-1-丝氨酸合成α,β-不饱和酮中间体4和5以及烯酮的非对映选择性还原。通过对(R)-和(S)-Mosher [甲氧基(三氟甲基)苯基乙酸]酯衍生物进行质子NMR分析,得出新甲醇中心的构型。神经酰胺类似物2和3在MCF-7细胞上显示出比1更高的抗增殖活性。