| 摘要 |
Bisphosphines represented by the general formula (I) <CHEM> wherein Ar<1> and Ar<2> each represents an arylene group which may be substituted; R<1> and R<2> each represents an alkyl group which may be substituted, or an aryl group which may be substituted, or R<1> and R<2> may combinedly form a ring together with the phosphorus atom bonded thereto; R<3> and R<4> each represents hydrogen atom or an alkyl group; and the carbon atoms each having R<3> and R<4> are bonded in positions ortho to the oxygen atom bonded to Ar<1> and Ar<2>: process for production thereof; Group VIII metal complexes comprising said bisphosphines; and process for producing aldehydes, which comprises, on hydroformylation of ethylenically unsaturated compounds with carbon monoxide and hydrogen, using said Group VIII metal complexes. <??>The hydroformylation of ethylenically unsaturated compounds according to the present invention can produce n-aldehydes at higher reaction rate and industrially more advantageously than with catalysts comprising conventional phosphines, while suppressing side reactions such as hydrogenation and isomerization. |
