Iridium(I)-Catalyzed Coupling of (Z)-2-En-4-yn-1-ols with Activated Alkynes: A New Synthetic Route to 7-Oxanorbornadienes
作者:Alba E. Díaz-Álvarez、Pascale Crochet、Victorio Cadierno
DOI:10.1002/adsc.201000408
日期:2010.10.4
Taking advantage of the ability shown by the iridium(I) dimer [Ir(μ-Cl)(COD)}2] to promote the cycloisomerization of (Z)-enynols into furans, an unprecedented syntheticroute to 7-oxanorbornadienes has been developed just by performing the catalytic reactions in the presence of activatedalkynes. The process, which proceeds under solvent-free conditions, furnishes the bicyclic alkenes in good yields
Palladium-catalyzed cycloisomerization of (Z)-enynols into furans using green solvents: glycerol vs. water
作者:Javier Francos、Victorio Cadierno
DOI:10.1039/c0gc00169d
日期:——
Heteroannulation reactions of (Z)-2-en-4-yn-1-ol derivatives into furans can be conveniently performed in water and glycerol using cis-[PdCl2(DAPTA)2] as catalyst. Higher activities were observed in an aqueous medium, but catalyst recycling was much more effective in glycerol.
An efficient furan synthesis using heterogeneous catalysis
作者:Simon J. Hayes、David W. Knight、Melanie D. Menzies、Mark O’Halloran、Wen-Fei Tan
DOI:10.1016/j.tetlet.2007.08.102
日期:2007.10
A wide variety of 3-alkyne-1,2-diols have been found to undergo exceptionally clean 5-endo-dig cyclisations followed by dehydration at ambient temperature to give the corresponding furans in essentially quantitative yields when exposed to 10 mol % of 10%,w/w silver(1) nitrate absorbed on silica gel. (C) 2007 Elsevier Ltd. All rights reserved.