The cationic rhodium(I) species derived from [Rh(COD)Cl](2) and AgSbF6 efficiently catalyze intrarnolecular [4+2] cycloadditions of ester-tethered 1,3-diene-8-yne derivatives such as 2-propynyl penta-2,4-dienoate and 2,4-pentadienyl propiolate derivatives in fluorinated alcohols. (c) 2005 Elsevier Ltd. All rights reserved.
Cationic Rh(I) Catalyst in Fluorinated Alcohol: Mild Intramolecular Cycloaddition Reactions of Ester-Tethered Unsaturated Compounds
作者:Akio Saito、Takamitsu Ono、Yuji Hanzawa
DOI:10.1021/jo060827x
日期:2006.8.1
In fluorinatedalcohols, the cationic Rh(I) species, which is derived from [Rh(COD)Cl]2 and AgSbF6, efficiently catalyzed intramolecular [4+2] cycloaddition reactions of ester-tethered 1,3-diene-8-yne derivatives. The catalytic system was also effective in intramolecular [5+2] cycloaddition reactions of ester-tethered ω-alkynyl vinylcyclopropane compounds.