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Rhodium pyrrolylphosphine complexes as highly active and selective catalysts for propene hydroformylation: the effect of water and aldehyde on the reaction regioselectivity.
Autorzy
Rok wydania
2018
Czasopismo
Numer woluminu
10
Strony
305-310
DOI
10.1002/cctc.201700917
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The hydroformylation of propene catalyzed by Rh(acac)(CO)2 (acac=acetylacetonate) with a 13-fold excess of N-pyrrolylphosphine ligands PPyr3, PPh2Pyr, or PPh(Pyr)2 (Pyr=NC4H4) was investigated under a pressure of 15 bar (propene/H2/CO=5:5:5) at 80 °C. The N-pyrrolylphosphine ligands facilitated an excellent regioselectivity towards n-butanal aldehyde, significantly better than PPh3 and PCy3 under the same conditions. In the presence of the strongest π-acceptor, PPyr3, the linear-to-branched aldehyde (l/b) ratio was 8.6, which increased to 27.1 if water was added to the system. The application of a pure aldehyde as a solvent instead of toluene caused a significant increase in the aldehyde yield but with a decreased l/b ratio (2.9–7.6). The regioselectivity parameter l/b increased to 19.3 after the introduction of water as a cosolvent.
Słowa kluczowe
aldehydes, alkenes, hydroformylation, phosphane ligands, rhodium
Adres publiczny
https://doi.org/10.1002/cctc.201700917
Strona internetowa wydawcy
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