Calixarene based phosphites

Parlevliet has shown that calix[4]arene based monophosphites can exist in different conformations [45]. By using the different conformations as ligands in the rhodium catalyzed hydroformylation of 1-octene he showed that the exact conformation influenced the performance of the catalyst. Some of the conformations behaved more like triphenyl phosphite, whereas others showed catalytic results like bulky monophosphites, giving high rates with moderate selectivity for the linear aldehyde. 

3 Cavalieri d Oro, P. Raimondi, L. Pagani, G. Montrasi, G. Gregorio, G. Oliveri del Castillo, G. F. Andreeta, A. Symposium on rhodium in homogeneous catalysis, 

4 Van Leeuwen, P. W. N. M. Van Koten, G. Catalysis. An Integrated approach to Homogeneous, Heterogeneous and Industrial Catalysis, Moulijn, J. A. Van Leeuwen, P. W. N. M. Van Santen, R. A. Eds., Elsevier Amsterdam. London, New York, Tokyo, 2nded. 1995, pp 199-222. 

13 Brown, J. M. Kent, A. G. J. Chem. Soc. Perkin Trans. H1987, 1597. 

15 Collman, J. P. Hegedus, L. S. Norton, J. R. Finke, R. G. Principles andApplications of Organotransition Metal Chemistry University Science Books Mill Valley, CA 2nd ed. 1987. 

---