Regio- and stereoselective 1,2 Wagner-Meerwein shifts during trifluoroacetic acid catalyzed isomerization of unsymmetrically substituted tricyclo[3.2.0.02,4]heptanes
Regio- and stereoselective 1,2 Wagner-Meerwein shifts during trifluoroacetic acid catalyzed isomerization of unsymmetrically substituted tricyclo[3.2.0.02,4]heptanes
Alxylations of α-methyl substituted β-diketones throught their Cu(II) complexes. Preparation of sterically congested β-diketones.
作者:María E. Lloris、Jorge Marquet、Marcial Moreno-Mañas
DOI:10.1016/s0040-4039(00)88524-x
日期:1990.1
The copper(II) complexes of 3-methylpentane-2,4-dione and 2-methyl-1-phenylbutane-1,3-dione are good substrates for C-alkylation with several alkyl bromides including 1-bromoadamantane and 9-bromofluorene. Sterically congested β-diketones have been prepared.
Reactions of copper(II) β-diketonates under free radical conditions. Preparation of highly congested β-diketones.
作者:María E. Lloris、Nicanor Gálvez、Jorge Marquet、Marcial Moreno-Mañas
DOI:10.1016/s0040-4020(01)81955-4
日期:1991.9
Copper(II) β-diketonates react with alkyl bromides under freeradical conditions to give highly congested β-diketones such as 3-(1-adamantyl)-3-alkylpentane-2,4-diones. Another typical freeradical reagent: benzoyl peroxide, reacts also functionalizing the intercarbonyl positions.
Asymmetric synthesis catalyzed by chiral ferrocenylphosphine-transition metal complexes. 5. Palladium-catalyzed asymmetric allylation of active methine compounds