Highly Regioselective and Active Rhodium/Bisphosphite Catalytic System for Isomerization-Hydroformylation of 2-Butene.

Mo, Min; Yi, Tao; Zheng, Cong-Ye; Yuan, Mao-Lin; Fu, Hai-Yan; Li, Rui-Xiang; Chen, Hua

The formation of linear aldehyde from isomerization-hydroformylation of 2-butene represents an important subject and current task in industry. Both high activity and excellent regioselectivity were achieved in the rhodium-catalyzed 2-butene isomerization-hydroformylation with 2,2′-bis(dipyrrolylphosphinooxy)-1,1′-(±)-binaphthyl ( 1) as ligand. Bulky phosphite with electron-withdrawing pyrrol groups dramatically improved the selectivity of linear product, and a good yield of 90.5% aldehydes was obtained with an excellent linear aldehyde regioselectivity of 95.3% under optimized condition. Graphical Abstract: Bulky phosphite with electron-withdrawing pyrrol groups dramatically improved the selective of linear product, and an excellent yield of 90.5% aldehydes with 95.3% regioselectivity of linear aldehyde was obtained in the Rh-catalyzed isomerization-hydroformylation of 2-butene in the presence of ligand 1.[Figure not available: see fulltext.]

RHODIUM catalysts; ISOMERIZATION; HYDROFORMYLATION; BUTENE; METAL complexes; LIGANDS (Chemistry); PYRROLES

Catalysis Letters, 2012, Vol 142, Issue 2, p238

1011-372X

Academic Journal

10.1007/s10562-011-0751-7