1,3-butadiene telomerization with methanol catalyzed by heterogenized palladium(II) complexes anchored to polymer-bound bis(diphenylphosphino)methanemoieties
F. Benvenuti et al., 1,3-butadiene telomerization with methanol catalyzed by heterogenized palladium(II) complexes anchored to polymer-bound bis(diphenylphosphino)methanemoieties, J MOL CAT A, 139(2-3), 1999, pp. 177-187
The telomerization of 1,3-butadiene with methanol in the presence of hetero
genized palladium(II) catalysts, obtained by anchoring the metal on both a
styrene/divinylbenzene macroporous resin and a linear poly(styrene) functio
nalized with bis(diphenylphosphino)methane moieties, is reported. In partic
ular, the activity and selectivity to telomers of the above catalytic syste
ms is compared with the corresponding homogeneous counterpart and with thos
e previously obtained with analogous heterogenized systems via polymer-boun
d 1,3-bis(diphenylphosphino)propane moieties. The effect of a methoxide pro
moter is also studied. Finally, the performances and metal leaching in solu
tion of the above heterogenized catalysts are checked after several reactio
n cycles in order to verify their real heterogeneous character. (C) 1999 El
sevier Science B.V. All rights reserved.