Cobalt(I)-catalyzed Neutral Diels-Alder Reactions of 1,3-Diynes with Acyclic 1,3-Dienes
作者:Gerhard Hilt、Konstantin I. Smolko
DOI:10.1055/s-2002-23547
日期:——
The cobalt catalyzed neutral Diels-Alder reaction of various acyclic1,3-dienes and norbornadiene with 1,3-diynes can be controlled to give the 1:1 adduct, whereas the 1:2 adducts are only formed with sterically less hindered 1,3-dienes. With unsymmetrical 1,3-diynes the regiochemistry is mainly controlled by steric factors for unfunctionalized diynes, whereas the regiodirecting methoxymethyl substituent