Synthesis of substituted γ- and δ-lactams based on titanocene(<scp>iii</scp>)-catalysed radical cyclisations of trichloroacetamides
作者:Faïza Diaba、Enrique Gómez-Bengoa、Juan M. Cuerva、Josep Bonjoch、José Justicia
DOI:10.1039/c6ra12180b
日期:——
A new procedure for the synthesis of γ- and δ-lactams based on a Cp2TiCl-catalysed cyclisation of trichloroacetamides under mild reaction conditions is reported. Theoretical studies supported the observed regioselectivity in the cyclisations and the mechanism involved in the dehalogenation process.
Cu(i)-catalyzed atom transfer radical cyclization of trichloroacetamides tethered to electron-deficient, -neutral, and -rich alkenes: synthesis of polyfunctionalized 2-azabicyclo[3.3.1]nonanes
作者:Faïza Diaba、Agustín Martínez-Laporta、Josep Bonjoch、Ana Pereira、José María Muñoz-Molina、Pedro J. Pérez、Tomás R. Belderrain
DOI:10.1039/c2cc34133f
日期:——
A novel synthetic entry to 2-azabicyclo[3.3.1]nonanes based on a copper(I)-catalyzed intramolecular coupling of amino-tethered trichloroacetamides and unsaturated nitriles, esters and alkenes, as well as enolacetates, is described. A study of the reaction conditions and the scope of the process is reported.
Catalyst-free photo-induced aerobic radical synthesis of lactams from <i>N</i>-alkenyl trichloroacetamides in 2-methyltetrahydrofuran as the radical initiator under violet light
作者:Faïza Diaba、Gisela Trenchs
DOI:10.1039/d3ob01804k
日期:——
The first violet light-mediated synthesis of γ- and δ-lactams from N-alkenyl trichloroacetamides is reported in tetrahydrofuran or 2-methyltetrahydrofuran alone. These catalyst and additive-free reactions are achieved with non-anhydrous solvents and under an air atmosphere where the solvent serves as the radical initiator.