GaCl<sub>3</sub>-Catalyzed Formation of Eight-Membered Rings from Enynes Bearing a Cyclic Olefin
作者:Soo Min Kim、Sang Ick Lee、Young Keun Chung
DOI:10.1021/ol061801v
日期:2006.11.1
GaCl3-catalyzed cycloisomerization of enynes having a cyclic olefin led to isolation of eight-membered ring compounds.
Au(I)-Catalyzed Cyclization of Enynes Bearing an Olefinic Cycle
作者:Sang Ick Lee、Soo Min Kim、Mi Ra Choi、Sun Young Kim、Young Keun Chung、Won-Sik Han、Sang Ook Kang
DOI:10.1021/jo061254r
日期:2006.12.1
Gold(I)-catalyzed cyclization of enynes containing an olefinic cycle has been studied. The introduction of an olefinic ring instead of a terminal alkene in enynes dramatically increased the yield of the reaction. Enynes having an olefinic cycle were prepared by a rhodium-catalyzed intermolecular [4 + 2] cycloaddition of diynes with butadiene. Consecutive rhodium-catalyzed Diels−Alder/gold(I)-catalyzed