Enantioselective Carbometalation of Cinnamyl Derivatives: New Access to Chiral Disubstituted Cyclopropanes— Configurational Stability of Benzylic Organozinc Halides
One-Pot Synthesis of Tetrahydrofuran Derivatives from Allylic Alcohols and Vinyl Ethers by Means of Palladium(II) Acetate
作者:Keigo Fugami、Koichiro Oshima、Kiitiro Utimoto
DOI:10.1246/bcsj.62.2050
日期:1989.6
Reaction of allylicalcohol with vinyl ether in the presence of Pd(OAc)2 afforded furanderivatives in good yield. Pd(OAc)2 was essential for the reaction. PdCl2 complex did not afford cyclized product but gave acetal exclusively. Three components were combined at once to produce 4-(3-butenyl)-2-butoxy-4-methyltetrahydrofuran upon treatment of a mixture of 2-methyl-2-propen-1-ol, butyl vinyl ether
Sulfuric Acid Adsorbed on Silica Gel. A Multipurpose Acid Catalyst
作者:Flavio Chávez、Silvia Suárez、Miguel A. Díaz
DOI:10.1080/00397919408019058
日期:1994.8
ketones to 1,3-dioxolanes and their hydrolysis, α,β-unsaturated ketones to enol ethers, and alcohols to methyl-methoxyethyl ethers are performed efficiently in high yield with sulfuric acid adsorbed on silicagel as catalyst.