Substituent Effects in Tandem Ring-Closing Metathesis Reactions of Dienynes
作者:François-Didier Boyer、Issam Hanna
DOI:10.1002/ejoc.200500645
日期:2006.1
Grubbs catalyst was observed and the cycloisomerization product was obtained as the major product. In the absence of favorable factors, especially when the starting substrates contain hindered alkenes, a long tether chain and/or an ester group on the alkyne part, the tandem process is slowed down or completely impeded. In these cases, dienynes behave like simple enynes and afford initial metathesis products
Alkylation of allylic derivatives. 13. Cross-coupling reactions of the isomeric 2,3,4,4a,5,6-hexahydro-2-naphthalenyl carboxylates with organocopper and Grignard reagents