The inside cover picture shows how by replacing the Si −CH2−CH2−Si group of disila-okoumal by a Si−CH2−Si or Si−O−Si unit, the volatility could significantly be improved to take full advantage of the C/Si exchange. The best 2R,4R-configured lower homologue (turquoise) overlaid on okoumal (green) is shown in front of an okoumé tree (photo courtesy of Roman Kaiser, Givaudan). For details see the communication by R. Tacke et al. on p. 315 ff.
R. Tacke, J.B. Nätscher, N. Laskowski, P. Kraft, Lower homologs of okoumal and disila-okoumal: syntheses and olfactory characterization of novel ambergris odorants, ChemBioChem 11, 315-319 (2010). Lesen Sie mehr ...
1a: Powerful sweet, woody-ambery odor, with camphoraceous-aromatic aspects
accompanied by fruity nuances in the direction of apricots
1d: Camphoraceous-earthy odor, with green-fruity facets and an acidic, sweaty,
butyric but no woody-ambery undertone
M. W. Büttner, S. Metz, P. Kraft, R. Tacke, Organometallics 2007, 26, 3925-3929. more ...