Thermolysis of Isomigrastatin and Its Congeners via [3,3]-Sigmatropic Rearrangement: A New Route to the Synthesis of Migrastatin and Its Analogues
作者:Jianhua Ju、Si-Kyu Lim、Hui Jiang、Jeong-Woo Seo、Yeng Her、Ben Shen
DOI:10.1021/ol062470p
日期:2006.12.1
conditions afforded migrastatin (1a). The reaction is proposed to proceed via a concerted [3,3]-sigmatropic rearrangement by which ring expansion is achieved regio- and enantiospecifically. The general applicability of this reaction was demonstrated with six additional isomigrastatin congeners (3-8), providing a new route to the synthesis of migrastatin analogues (3a-8a). [reaction: see text]
在纯净的加热条件下,异米格拉他汀(1)的热解得到了米格拉他汀(1a)。提出该反应通过协同的[3,3]-σ重排进行,通过该重排可在区域和对映体上实现环的扩展。该反应的普遍适用性通过另外六个异西格他汀同类物(3-8)得到了证明,为合成偏头痛素类似物(3a-8a)提供了一条新途径。[反应:看文字]