An Efficient Method for Cyclopentene Annulation onto α,β-Unsaturated Ketones: W(CO)<sub>5</sub>(L)-Catalyzed 5-Endo-Dig Cyclization of 6-Siloxy-5-en-1-ynes
作者:Nobuharu Iwasawa、Tomoya Miura、Koichi Kiyota、Hiroyuki Kusama、Kooyeon Lee、Phil Ho Lee
DOI:10.1021/ol026993i
日期:2002.12.1
[reaction: see text] A highly efficient method for the cyclopentene annulation onto alpha,beta-unsaturated ketones is described. Indium-mediated 1,4-propargylation onto alpha,beta-unsaturated ketones in the presence of tert-butyldimethylsilyl triflate and dimethyl sulfide gives the 6-siloxy-5-en-1-yne derivatives, which undergo W(CO)(5)(L)-catalyzed 5-endo-dig cyclization to give the corresponding
Intramolecular cyclopentene annulation. 2. Synthesis and carbon-13 nuclear magnetic resonance spectroscopy of bicyclo[4.3.0]non-7-en-2-ones
作者:Tomas Hudlicky、Francis J. Koszyk、Delores M. Dochwat、Garry L. Cantrell
DOI:10.1021/jo00327a014
日期:1981.7
Palladium-mediated transannular cyclizations of medium-ring olefinic enolsilanes
作者:Andrew S. Kende、Clara E. Mota Nelson、Sébastien Fuchs
DOI:10.1016/j.tetlet.2005.09.125
日期:2005.11
Medium-ring olefinic ketone and lactone enolsilanes were subjected to palladium(II)-mediated cycloalkenylation conditions. Diverse bicyclic ring products were obtained in moderate to good yields. The effect of olefin geometry and ring size is discussed. (c) 2005 Elsevier Ltd. All rights reserved.
HUDLICKY T.; KOSZYK F. J.; DOCHWAT D. M.; CANTRELL G. L., J. ORG. CHEM., 1981, 46, NO 14, 2911-2915
作者:HUDLICKY T.、 KOSZYK F. J.、 DOCHWAT D. M.、 CANTRELL G. L.