作者:Andreas Knierzinger、Alfred Grieder、Peter Schönholzer
DOI:10.1002/hlca.19910740308
日期:1991.5.2
Palladium-catalyzed ene-type cyclizations of 1,6-enynes 2 yield methylidene-cyclopentane derivatives 3. Removal of protecting groups from 3 furnishes the diols 4 and 5, whose configurations were established by a combination of X-ray and 1H-NMR techniques. The predominant formation of isomers 4 is discussed in the context of two alternative hypothetical mechanisms previously proposed for this type of
1,6-烯炔2的钯催化的烯型环化产生亚甲基-环戊烷衍生物3。从3个保护基团的去除提供了二醇4和5,其构型是通过X射线和1 H-NMR技术的结合而建立的。在先前针对这种类型的环化提出的两种替代假设机制的背景下,讨论了异构体4的主要形成。