Cationic rhodium bis(dioxaphosphorus heterocycle) complexes and

Details Cationic rhodium bis(dioxaphosphorus heterocycle) complexes and Cationic rhodium bis(dioxaphosphorus heterocycle) complexes and

1992-10-27

1993-11-09

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568451, 502166, C07C 4550

Patent

active

052604918

ABSTRACT:
Cationic rhodium bis(dioxaphosphorus heterocycle) complexes of the formula: ##STR1## in which R is preferably ##STR2## or (CH.sub.2).sub.2-5, Y . . . Y is any backbone chain of 2-5 atoms, and L and L' are any stabilizing ligands, used in hydroformylation of olefins to obtain regioselectivity of branched aldehyde products. The formula of the catalyst may include substituents which do not interfere with the branched product regioselectivity of the catalyst as a whole. In the hydroformylation method the olefin is reacted with hydrogen and carbon monoxide in the presence of the catalyst at a temperature and pressure sufficient to permit the desired branched product regioselectivity.

REFERENCES:
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Lazzaroni, R. et al., "Regioselectivity in the Rhodium-Catalyzed Hydroformylation of Styrene as a function of Reaction Temperature and Gas Pressure", J. Mol. Catalysis 50:1-9 (1989).
Neibecker, D. et al., "Synthesis of 2-Arylpropionaldehydes through Hydroformylation", J. Org. Chem. 54:5208-5210 (1989).
Amer, I. et al., "Zwitterionic Rhodium Complexes as Catalysts for the Hydroformulation of Olefins", J. Am. Chem. Soc. 112:3674-3676 (1990).
Brown, J. et al., "Hydroformylation Catalyzed by Rhodium Complexes of Trehalose-Derived Ligands aa and .beta..beta. Tredip; a Highly Regioselective Route to .alpha.-Methylarylpropionaldehydes"; Tetrahedron 42(18):5105 (1986).
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