New Pd-catalyzed tandem cyclization processes on group 6 bis-carbene complexes.
The reaction of bis-carbene complexes 1a,b derived from catechol and Pd-catalysts gave product 3 derived from an intramolecular coupling-electrocyclization process, while nucleophilic attack-NH-carbene insertion product 6 was obtained from complexes 1c,d derived from 1,2-diaminobenzene.
Sierra
Miguel A
MA
Departamento de Química Orgánica, Facultad de Química, Universidad Complutense, 28040-Madrid, Spain. sierraor@quim.ucm.es
del Amo
Juan C
JC
Mancheño
María J
MJ
Gómez-Gallego
Mar
M
Rosario Torres
M
M