The selective O-acylation of enolates providing a simple entry to O-enesters
作者:Dominique Limat、Manfred Schlosser
DOI:10.1016/0040-4020(95)00250-c
日期:1995.5
In the presence of catalytic amounts of a fluoride source, O-trimethylsilyl enethers undergo condensation with acyl fluorides to afford O-enesters with high yields. The intermediates and final products are pure (Z) isomers if only one double bound is in conjugation with the oxygen atom whereas (E) isomers prevail if silyl dienethers or trienethers and O-dienesters or O-trienesters are formed.
synthesized by the fluoride ion-mediated reaction of [60]fullerene with 2-bromoenol silyl ethers, which were easily prepared by 2-bromination of the corresponding enol silyl ethers. The reactivity differed significantly depending on the stability of the 2-bromoenol silyl ethers. High yield and selectivity were achieved for the reaction of 2-bromoenol trimethylsilyl ethers under mild conditions (KF/18-crown-6-ether)
Surface-mediated solid phase reaction. Aldol reaction of silyl enol ethers with aldehydes on a solid surface of neutral alumina: selectivity for anti aldols
作者:Brindaban C. Ranu、Rupak Chakraborty
DOI:10.1016/s0040-4020(01)82382-6
日期:1993.6
The aldolreaction of trimethyl silylenolethers with aldehydes on the solid surface of neutral alumina under sonication without any solvent is found to proceed providing cross aldol products with anti selectivity.
Surface-mediated solid phase reaction. Mukaiyama-Michael addition of silyl enol ethers to methyl vinyl ketone on the surface of alumina
作者:Brindaban C. Ranu、Manika Saha、Sanjay Bhar
DOI:10.1016/s0040-4039(00)91983-x
日期:1993.3
Clean and efficient Michael addition of silyl enol ethers to methyl vinyl ketone has been achieved through a simple solvent-free reaction on the surfac
Reaction of N-Nonaflylbenzotriazole with Silyl Enol Ethers
作者:Thomas Ziegler、Moritz Uhde
DOI:10.1055/s-0028-1083371
日期:2009.4
N-Nonaflylbenzotriazole reacts with trimethylsilyl enol ethers in tetrahydrofuran at room temperature under tetrabutylammonium fluoride catalysis to afford o-(nonafluorobutylsulfonamido)phenylhydrazones in 19-82% yield. N-Nonaflylbenzotriazole reacts twice with the less sterically demanding silyl enol ethers to afford the corresponding o-(nonafluorobutylsulfonamido)phenylazo enols in 41-75% yield.