Application of an Enyne Metathesis/Diels-Alder Cycloaddition Sequence: A New Versatile Approach to the Syntheses of C-Aryl Glycosides and Spiro-C-Aryl Glycosides
作者:Ayyagari V. Subrahmanyam、Kalanidhi Palanichamy、Krishna P. Kaliappan
DOI:10.1002/chem.201000482
日期:——
metathesis on the sugar enyne is performed to generate the 1,3‐diene moiety for the synthesis of spiro‐C‐aryl glycosides. Efforts to extend this strategy to the synthesis of the core structure of natural C‐aryl glycoside gilvocarcin are also described. A combination of both C‐aryl and spiro‐C‐aryl glycosides in the same moiety to combine the features thereof has also been accomplished. A tandem enyne metathesis/Diels–Alder
用于多种合成的有效方法Ç -芳基和螺- C ^ -芳基糖苷进行说明。在此采用的这种面向多样性的策略依赖于顺序的烯炔复分解生成1,3-二烯部分,并与不同的亲二烯体进行Diels-Alder反应,然后进行芳构化。尽管使用乙烯气体进行的跨烯炔复分解将1,3-二烯部分安装在端基中心以合成C-芳基糖苷,但在糖烯炔上进行分子内烯炔复分解以生成1,3-二烯部分为螺合成ç -芳基糖苷。将这种策略扩展到合成天然C核心结构的努力还描述了芳基糖苷gilvocarcin。两者的结合Ç -芳基和螺- Ç -芳基糖苷在相同结构部分到其也已完成的功能结合起来。还尝试了串联烯炔复分解/ Diels-Alder反应/芳香化反应,尽管收率低,但可以直接在一个锅中直接获得C-芳基糖苷。