RHODIUM COMPLEX-CATALYZED HYDROFORMYLATION REACTIONS OF LINEAR AND CYCLIC MONOLEFINS AND DIOLEFINS

The hydroformylation reactions of cyclopentene, cyclohexene, 4-vinylcy clohexene, cycloheptene and cyclooctene, catalyzed with a Rh(acac){P(O Ph)3}2/P(OPh)3 (I) system at 80-degrees-C and 10 atm (CO + H-2), have been studied. Only cyclopentene and 4-vinylcyclohexene undergo hydrofo rmylation at 1 atm and 40-degrees-C. The hydroformylation of some cycl ic dienes; (1,3- and 1,4-cyclohexadienes, 1,3- and 1,5-cyclooctadienes and 1,3-cyclopentadiene), at 10 atm and 80-degrees-C, was investigate d in two catalytic systems: (I) and Rh(acac)(CO)(PPh3)/PPh3 (II). The main reaction products of cyclohexadienes and pentadiene (at 80-degree s-C, 10 atm) are unsaturated monoaldehydes. In hydroformylation of 1,5 -cyclooctadiene the main product is formylcyclooctane.