New naphthalene complexes of Ru(0) with various Ru(η6-naphthalene)(cyclic diene) (3) ligands catalyze linear cross-dimerization between conjugated dienes and acrylates. One of the noteworthy catalysts is the dibenzocyclooctatetraene complex 3d, which shows high catalytic activity for the cross-dimerization between 1,3-pentadiene and methyl acrylate to give the cross-dimers in 99% yield (branch/linear
Synthesis of and Catalytic Linear Cross-Dimerizations by an Electron-Deficient Cyclic Diene Complex of Ruthenium(0)
作者:Masafumi Hirano、Yukino Tanaka、Nobuyuki Komine
DOI:10.1021/acs.organomet.8b00645
日期:2018.11.26
ruthenium(0) complex [Ru(η6-naphthalene)(η4-Ph-dbcot)] (1a: Ph-dbcot = 5-phenyldibenzo[a,e]cyclooctatetraene) is newly prepared in 53% yield. The IR experiment of [Ru(η4-2,3-dimethylbutadiene)(η4-Ph-dbcot)(CO)] (2a) shows this formal zerovalent ruthenium complex to be very electron-deficient, even though the Ph-dbcot ligand does not have any particular electron-withdrawing functional group. Complex 1a shows