| abstract |
A rhodium-phosphine complex is represented by the formula:n [Rh(p-Tolyl BINAP)2]<+>Y<->n wherein p-Tolyl BINAP represents 2,2 min -bis(di-p-tolylphosphino)-1,1 min binaphthyl, and Y represents C104, PF6, BF4 or PCl6. n<??>The complex is prepared by reacting in a solvent the p-Tolyl BINAP with a rhodium complex of formula:n [Rh(olefin)(p-Tolyl BINAP)]<+>Y (V)n optionally with hydrogenation of the mixed solution. n<??>Methods are described for preparing these reagents. n<??>The complex is useful as a highly active catalyst in industrial reactions, e.g synthesis under pressure for several hours of citronella or of a derivative thereof, especially for asymmetric hydrogenation or dehydrogenation. |