Artículos de revistas
Influence of the bite natural angle of bidentate diphosphine ligands in the syngas-free branched hydroformylation of Β-functionalized olefins
Fecha
2018Registro en:
Catalysis Communications, Volumen 116,
15667367
10.1016/j.catcom.2018.08.007
Autor
Vilches-Herrera, Marcelo
Concha-Puelles, Matias
Carvajal, Nicole
Molina, Juana
Santander, Rocio
Caroli Rezende, Marcos
Lühr, Susan
Institución
Resumen
© 2018 Elsevier B.V. The correlation between the activity, regio- and chemoselectivity of Rh-diphosphine catalyst and the ligand bite natural angle (βn) in the syngas-free hydroformylation of allyl cyanide was investigated. A screening of Xantphos type and diphosphine alkyl ligands with different bite natural angles was studied. Interesting, a switch in the linear to the branch regioselectivity was found. Wide βn favour a linear regioselectivity whereas smaller βn allow the formation of the branched aldehyde as the major product. Modification of the substituents at the phosphorus atoms of the diphosphine ligands produced a dramatic change in the hydroformylation. Others β-functionalized olefins were also branched hydroformylated.