Synthesis and reactions of two stereoisomeric [4.5.5.5]fenestranes with bridgehead substituents
作者:Philipp Weyermann、Reinhart Keese
DOI:10.1016/j.tet.2011.03.086
日期:2011.5
of 5% and 10%, respectively. For introduction of a bridgehead double bond the removal of the tertiary hydroxy group was investigated in the two stereoisomeric hydroxyketones 12 and 15. Whereas the dehydration readily occurred in 12, a ring opening reaction was observed for 15.
具有七个不同功能的[4.5.5.5]芬太烷2和3分七个步骤制备,总收率分别为5%和10%。为了引入桥头双键,研究了在两个立体异构体羟基酮12和15中叔羟基的去除。脱水在12中很容易发生,而开环反应在15中观察到。