and triethylamine gave (3,4)-()-1,4-diphenyl-3-methyl-4-hydroxy-1-butene (3a) and (3,4) isomer (3b) in a ratio of 90 to 10, the stereochemistry indicating that the allylation proceeded via six-membered cyclic transition states. Allylation with ()-()-1-phenyl-1-(trifluorosilyl)-2-butene (10) in the presence of cesium fluoride also proceeded via six-membered transition states.
A method of performing a chemical reaction includes reacting an allyl donor and a substrate in a reaction mixture, and forming a homoallylic alcohol in the reaction mixture. The substrate may be an aldehyde or a hemiacetal. The reaction mixture includes a ruthenium catalyst, carbon monoxide at a level of at least 1 equivalent relative to the substrate, and water at a level of at least 1 equivalent relative to the substrate, and an amine at a level of from 0 to 0.5 equivalent relative to the substrate. The reaction mixture may also include a halide, and the equivalents of the amine may be similar to those of the halide. The reacting includes maintaining the reaction mixture at a temperature of at least 40° C. The method may be catalytic in metal, environmentally benign, amenable to large-scale applications, and applicable to a wide range of substrates.
[EN] METHOD FOR FORMING ALLYLIC ALCOHOLS<br/>[FR] PROCÉDÉ DE FORMATION D'ALCOOLS ALLYLIQUES
申请人:UNIV ILLINOIS
公开号:WO2010025366A2
公开(公告)日:2010-03-04
A method of performing a chemical reaction includes reacting an allyl donor and a substrate in a reaction mixture, and forming a homoallylic alcohol in the reaction mixture. The substrate may be an aldehyde or a hemiacetal. The reaction mixture includes a ruthenium catalyst, carbon monoxide at a level of at least 1 equivalent relative to the substrate, and water at a level of at least 1 equivalent relative to the substrate, and an amine at a level of from 0 to 0.5 equivalent relative to the substrate. The reaction mixture may also include a halide, and the equivalents of the amine may be similar to those of the halide. The reacting includes maintaining the reaction mixture at a temperature of at least 40°C. The method may be catalytic in metal, environmentally benign, amenable to large-scale applications, and applicable to a wide range of substrates.