In ring-closing metathesis (RCM) reactions of enynes, the substituents on the multiplebonds are quite important. Although RCM of an enyne having a monosubstituted alkene proceeds smoothly using the first-generation ruthenium-carbene complex 1a, that of an enyne having a disubstituted alkene and internal alkyne using 1a does not proceed. However, the second-generation ruthenium-carbene complex 1b or
Rhodium(I)-Catalyzed Cycloisomerization of 1,6-Enynes to Bicyclo[4.1.0]heptenes
作者:Sun Young Kim、Young Keun Chung
DOI:10.1021/jo902273x
日期:2010.2.19
Efficient rhodium(I)-catalyzed cyclopropanation reactions of nitrogen-tethered 1,6-enynes to azabicyclo[4.1.0]heptenes are reported. Moreover, rhodium(I)-catalyzed tandem cycloisomerization and carbonylative [3+3+1] cycloaddition reactions of a cyclopropylenyne have been observed.