Abstract
A new class of N-pyrrolylphosphanes based on new heterocyclic amines have been synthesized, characterized and applied in homogeneous rhodium-catalyzed hydroformylation of 1-octene. These ligands possessing strong π-acceptor properties effectively facilitate the olefin isomerization. The steric effect of ligands has also been examined. Large steric tetraphosphane ligand afforded better regioselectivity, and the L/B ratio of about 6.4 was obtained at low synthesis gas pressure (5 bar).
Graphical Abstract
New heterocyclic amines have been developed, and two type pyrrole-based ligands possessing strong π-acceptor and weak ó-donor properties have been prepared. High regioselectivity has been achieved in the rhodium-catalyzed hydroformylation of terminal olefin.
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The authors thank the financial supports from the National Natural Science Foundation of China (201202108).
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Zhang, L., Li, C., Zheng, X. et al. Synthesis, Characterization of N-Pyrrolylphosphanes Based on Heterocyclic Amine Backbones and Their Application in Hydroformylation of 1-Octene. Catal Lett 144, 1074–1079 (2014). https://doi.org/10.1007/s10562-014-1250-4
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DOI: https://doi.org/10.1007/s10562-014-1250-4