The addition of a beta C-H bond to the formyl group of aldehydes to olefins
took place with the aid of Ru(H)(2)(CO)(PPh3)(3) as a catalyst. Several ol
efins can be used in the catalytic reaction of conjugate enals. The presenc
e of a sterically hindered substituent at the ortho position of benzaldehyd
e and the presence of an electron donating substituent appear to be importa
nt factor in accomplishing the desired coupling reaction.