Iridium complex-catalyzed highly selective cross [2 + 2 + 2] cycloaddition of two different monoynes: 2:1 Coupling versus 1:2 coupling
(Matrix presented) Highly selective cross [2 + 2 + 2] cycloaddition of two different monoynes is achieved by using a catalytic amount of [Ir(cod)Cl] 2 and ligand. The ligand had a considerable effect on the reaction. When 1,2-bis(diphenylphosph
Takeuchi, Ryo,Nakaya, Yoshihiko
p. 3659 - 3662
(2007/10/03)
Diazadienes as control ligands in homogeneous catalysis XVIII. Palladacyclopentadienes and platinacyclopentadienes and the co-cyclotrimerization of various alkynes
Bis(dibenzylidene acetone)palladium reacts readily with N-aryl diazadienes (dad = ArN=CRCR=NAr) and two moles of dialkyl acetylenedicarboxylates ECCE (E = COOR) to form the palladacyclopentadienes (dad)PdCE=CECE=CE (2a-h).With a propiolic ester HCCE