Tandem hydroformylation-hydrogenation of 1-decene catalyzed by Rh-bidentate bis(trialkylphosphine)s.
A series of 2,2'-bis[(dialkylphosphino)methyl]biphenyls (alkyl-BISBIs) were synthesized and applied to the tandem hydroformylation-hydrogenation of 1-decene. The alkyl-BISBI ligands with "small" primary alkyl groups such as methyl or n-hexyl groups on the phosphorus atoms provided 1-alkanols selectively, whereas those with larger alkyl groups such as isopropyl or neopentyl groups showed much lower conversion from alkanals to alkanols. Observation of rhodium complexes of the BISBI-type ligands under H(2)/CO atmosphere revealed that the presence of a stable [RhH(CO)(2)(ligand)] species seems to be less favorable for the second step, the hydrogenation of aldehydes.
Ichihara
Takeo
T
Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Nakano
Koji
K
Katayama
Masaya
M
Nozaki
Kyoko
K