Xantphite: a new family of ligands for catalysis. Applications in the hydroformylation of alkenes

CB Dieleman, PCJ Kamer, JNH Reek…

Index: Dieleman, Cedric B.; Kamer, Paul C. J.; Reek, Joost N. H.; Van Leeuwen, Piet W. N. M. Helvetica Chimica Acta, 2001 , vol. 84, # 10 p. 3269 - 3280

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Citation Number: 28

Abstract

Abstract The novel bulky diphosphite (P∩ P) ligands (3 and 4) based on the 2, 7, 9, 9- tetramethyl-9H-xanthene-4, 5-diol (2) backbone were investigated in the Rh-catalyzed hydroformylation of oct-1-ene, styrene, and (E)-oct-2-ene. These diphosphites gave rise to very active and selective catalysts for the hydroformylation of oct-1-ene to nonanal with average rates> 10000 (mol aldehyde)(mol Rh)− 1 h− 1 (P (CO/H 2)= 20 bar, T= 80,[Rh]= 1 ...