作者:Tsuyoshi Kitamura、Yuichi Kuzuba、Yoshihiro Sato、Hideaki Wakamatsu、Reiko Fujita、Miwako Mori
DOI:10.1016/j.tet.2004.05.030
日期:2004.8
Ring-opening metathesis and ring-closing metathesis (ROM-RCM) of cycloalkene-yne was demonstrated using a first- or second-generation ruthenium complex. When cycloalkenes bearing the alkyne part at the C-3 position were reacted with a first-generation ruthenium-carbene complex under an atmosphere of ethylene, ROM-RCM proceeded smoothly to give skeletal reorganized products in good yields. In this reaction, cycloalkene-ynes having terminal alkyne were suitable. On the other hand, when cycloalkenes bearing the alkyne part at the C-1 position were treated with a second-generation ruthenium-carbene complex, ROM-RCM proceeded smoothly to give bicyclic compounds and/or dimeric compounds in good yields. (C) 2004 Elsevier Ltd. All rights reserved.
Ruthenium-Catalyzed ROM−RCM of Cycloalkene-yne
作者:Miwako Mori、Yuichi Kuzuba、Tsuyoshi Kitamura、Yoshihiro Sato
DOI:10.1021/ol026696d
日期:2002.10.1
graphicROM-RCM (ring-opening and ring-closing metatheses) of cycloalkene-yne was demonstrated using a second-generation ruthenium complex. When cycloalkene bearing the alkyne moiety at the C-1 position was reacted with a ruthenium-carbene complex under an atmosphere of ethylene, ROM-RCM proceeded smoothly to give bicyclic compound and/or dimeric compound in good yields.
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.