Mild catalytic deoxygenation of amides promoted by thorium metallocene
作者:Sayantani Saha、Moris S. Eisen
DOI:10.1039/d0dt02770g
日期:——
organoactinide-catalyzed (Cp*2ThMe2) hydroborated reduction of a wide range of tertiary, secondary, and primary amides to the corresponding amines/amine–borane adducts via deoxygenation of the amides is reported herein. The catalytic reactions proceed under mild conditions with low catalyst loading and pinacolborane (HBpin) concentration in a selective fashion. Cp*2ThMe2 is capable of efficiently catalysing
Zirconium-hydride-catalyzed site-selective hydroboration of amides for the synthesis of amines: Mechanism, scope, and application
作者:Bo Han、Jiong Zhang、Haijun Jiao、Lipeng Wu
DOI:10.1016/s1872-2067(21)63853-6
日期:2021.11
diverse amines. Various readily reducible functional groups, such as esters, alkynes, and alkenes, were well tolerated. Furthermore, the methodology was extended to the synthesis of bio- and drug-derived amines. Detailed mechanistic studies revealed a reaction pathway entailing aldehyde and amido complex formation via an unusual C–N bond cleavage-reformation process, followed by C–O bondcleavage.
Trifluoroethylidenation of compounds with activated methylene groups
作者:Célal Ates、Zdenek Janousek、Heinz G. Viehe
DOI:10.1016/s0040-4039(00)73840-8
日期:1993.9
α-trifluoromethyl iminium trifluoroacetates 5 can be prepared from N-oxides 4 and used in situ or after isolation. Condensation occurs with carbonyl activatedmethylenegroups to give useful β-trifluoromethyl vinyl ketones 8.