作者:Peter Wipf、Srikanth Venkatraman
DOI:10.1021/jo960891m
日期:1996.1.1
the presence of a threonine-derived bioxazole core and an N-(1,1-dimethyl)allyl ("reverse prenyl") valine residue. In the context of our synthesis, efficient new strategies for the preparation of these segments were developed. The synthesis of two epimers of muscoride A allowed the unambiguous assignment of the relative and absolute configuration of the natural product by NMR and optical rotation analyses
15步合成了最近分离的蓝藻代谢产物muscoride A,总产率为4.3%。该肽抗生素的新结构特征包括苏氨酸衍生的生物恶唑核和N-(1,1-二甲基)烯丙基(“反向异戊烯基”)缬氨酸残基的存在。在我们的综合背景下,开发了用于制备这些片段的有效新策略。粘胶A的两个差向异构体的合成允许通过NMR和旋光分析明确分配天然产物的相对和绝对构型。