NEW PYRIDINE LIGAND HAVING POLYPHENYLENE GROUP, AND OXIDATION CATALYST COMPRISING COMPLEX OF THE LIGAND AND Pd

摘要

PROBLEM TO BE SOLVED: To provide a Pd complex catalyst useful for an oxidation reaction of alcohols in air under 1 atm; and to provide a ligand providing the Pd complex catalyst especially forming a homogeneous system in a solvent.;SOLUTION: The new pyridine ligand is represented by general formula 1 (wherein, R₁ is H, or a phenyl or polyphenylene group which may have a substituent selected from the group consisting of a phenyl group, a polyphenylene group, a 1-3C alkyl group and an electron-donating group, and present at 4- or 5-position based on N; G is a substituent present at 2- or 3-position based on N, and is a phenyl or polyphenylene group which may have a substituent selected from the group consisting of a phenyl group, a polyphenylene group, a 1-3C alkyl group and an electron-donating group) and has a polyphenylene group. The catalyst for the oxidation of the alcohols in the air under 1 atm is represented by general formula: Pd(OAc)₂L₂ (wherein L is the ligand) and has the pyridine ligand L coordinated therewith.;COPYRIGHT: (C)2005,JPO&NCIPI