Rhodium-Catalyzed Aldol-Type Chemistry Under Syngas: Selective Reductive Dimerizations of Aldehydes to Monoaldehydes and Further Oxidation to nor-Ketones

Large-cage (11–13-vertex) dicarbon metallacarboranes of platinum metals with mono- and polycyclic diolefin ligands

“…Dimerization with the use of 111a and b in combination with additives (PPh 3 , PPh 3 + H 2 O, or H 2 O), which proved to be the catalytic systems of choice in this reaction, gave products in moderate to good yields (up to 90%). However, the selectivity of the formation of all these homocoupling compounds remained poor as compared to that observed with Wilkinson's catalyst, which afforded DFBAL in 80% yield along with insignificant amounts (<2%) of two other coupling products, DFBOL and DFBEAL [104].…”