ASYMMETRIC HYDROFORMYLATION OF 1,2-DISUBSTITUTED OLEFINS CATALYZED BYCHIRAL PHOSPHINEPHOSPHITE-RHODIUM(I) COMPLEXES

Hydroformylations of internal olefins such as (E)- and (Z)-but-2-ene, (E)- and (Z)-1-phenylprop-1-ene, indene, and 1,2-dihydronaphthalene ca talysed by (R,S)-binaphos-Rh-l complex {(R,S)-binaphos = -2'-yl][(S)-1 ,1'-binaphthalen-2,2'-diyl]phosphite} or its enantiomer gave the corre sponding oxoaldehydes in up to 97% enantiomeric excess, e.e.