Synthesis of a cis-5-cyclodecenone and cis fused hydronaphthalenols through control of the stereochemistry of the oxy-Cope rearrangement with the tri-n-propylsilyl substituent
作者:Yongliang Chu、David Colclough、David Hotchkin、Myla Tuazon、James B. White
DOI:10.1016/s0040-4020(97)00952-6
日期:1997.10
In the course of preparing a trimethylsilyl substituted 5-cyclodecenone through anionic oxy-Cope rearrangement of a trans-1,2-divinylcyclohexanol, it was discovered that the silyl substituent in the divinylcyclohexanol is positioned so that it destabilizes [3,3]-sigmatropic rearrangement through the normally observed chair-like transition state. In the case of the tri-n-propylsilyl derivative, oxy-Cope
在通过反式-1,2-二乙烯基环己醇的阴离子氧基-Cope重排制备三甲基甲硅烷基取代的5-环癸烯酮的过程中,发现二乙烯基环己醇中的甲硅烷基取代基的位置使得其使[3,3]-σ不稳定通过通常观察到的椅子状过渡状态进行重新排列。在三的情况下Ñ -propylsilyl衍生物,氧- Cope重排,观察到通过舟状过渡状态,以发生只得到(ë)-5-(三- Ñ -propylsilyl)-5- cyclodecenone与相对于环的顺式双键。酸诱导的跨环环Ë 异构体导致1,6-环化并生成顺式融合萘二酚。