Sulfur in Hydrogenation, Isomerization, and Related Reactions

Very recently the [ CpFe(l,2-(PPh2)2-4- Bu) Rh(S- Bu)(CO)] complex containing a terminal tert-butylthiolato ligand has been shown to be active in the hydro-formylation of 1-octene at 1 MPa, but with a mediocre selectivity in linear aldehyde (52 %) however, the complex was recovered unchanged after catalysis [33], A few studies have been carried out on alkoxycarbonylation, but the catalytic activities are relatively low [14, 33], 

Of course, many efforts have been devoted to the design of chiral sulfur-containing complexes in order to achieve asymmetric hydrogenation including hydrogen transfer, mainly from isopropanol [14]. The good activity of the [Ir( 1,5-COD)(dithioether)] complexes is interesting they achieve the hydro- 

These mixed bridged-dinuclear Rh complexes [Rh2(//-Cl)(//-SR)(CO)2(PR 3)2] also catalyze the transformation of epoxides or unsaturated alcohols into the corresponding ketones [39]. 

Finally, it is important to mention that hydrodesulfurization occurs with catalyts which present a low sensitivity to substrates containing sulfur in the backbone (cf. Section 3.2.13). 

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