Highly convenient electrolysis procedure for the preparation of .alpha.-halogenated ketones and acetals from enol acetates, enol ethers, and silyl enol ethers
Synthesen makrocyclischer Lactone durch Ringerweiterung Herstellung von (±)-Phoracantholid I, (±)-Dihydrorecifeiolid und (±)-15-Hexadecanolid
作者:Kalina Kostava、Manfred Hesse
DOI:10.1002/hlca.19840670708
日期:1984.11.7
Syntheses of Macrocyclic Lactones by Ring Enlargement Reaction Reaction. Preparation of (±)-Phoracantholide I, (±)-Dihydrorecifeiolide and (±)-15-Hexadecanolide
New synthetic methods for α,β -unsaturated ketones, aldehydes, esters and lactones by the palladium-catalyzed reactions of silyl enol ethers, ketene silyl acetals, and enol acetates with allyl carbonates
Silyl enol ethers and ketenesilylacetals derived from ketones, aldehydes, esters and lactones are converted into α,β-unsaturated ketones, aldehydes, esters and lactones by treatment with allyl carbonates in high yields using the palladium—bis(diphenylphosphino)ethane (dppe) complex as catalyst. Phosphine-free palladium catalyst instead of the palladium—phosphine complex gives a higher selectivity
One-step synthesis of α,β-unsaturated ketones by the reaction of enol acetates with allyl methyl carbonate catalyzed by palladium and tin compounds
作者:Jiro Tsuji、Ichiro Minami、Isao Shimizu
DOI:10.1016/s0040-4039(00)94161-3
日期:1983.1
Enol acetates derived from saturated ketones are converted to α,β-unsaturated ketones by heating with allyl methyl carbonate in MeCN by bimetallic catalysis of palladium-phosphine complex and tin methoxide.
Taming elemental fluorine: Indirect use of fluorine for the synthesis of α-fluoroketones[1]
作者:Shlomo Rozen、Ynon Menahem
DOI:10.1016/s0022-1139(00)85146-5
日期:1980.7
Fluorine and sodium trifluoroacetate react at −75° to produce a variety of fluoroxy-compounds. Although it is possible to direct the reaction towards the formation of CF3COOF or CF3CF2OF, mixtures may be used when only the electrophilicfluorine has to be attached to the molecule of interest. Such is the case of the reaction of enol-acetates with the mixture of the fluoroxy reagents. A wide variety
Unique Michael Addition-Initiated Domino Reaction for the Stereoselective Synthesis of Functionalized Macrolactones from α-Nitroketones in Water
作者:Giorgio Giorgi、Sonia Miranda、Pilar López-Alvarado、Carmen Avendaño、Jean Rodriguez、J. Carlos Menéndez
DOI:10.1021/ol0505860
日期:2005.5.1
beta-unsaturated aldehydes in aqueous base was discovered, leading to the one-pot synthesis of hitherto unknown functionalized, bridged, bicyclic lactones containing 10-, 11-, 13-, and 15-membered rings. The structures of these heterocyclic compounds, containing also an unusual 6-hydroxy-1,2-oxazine ring, were determined by spectral and single-crystal X-ray diffraction studies.