| 摘要 |
PROBLEM TO BE SOLVED: To provide an industrially advantageous manufacturing method for 3,3',4,4'-tetramethyl-4''-phenyltriphenylamine without using heavy metals such as copper or the like low in environmental load and in a simple operation. SOLUTION: This 3,3',4,4'-tetramethyl-4''-phenyltriphenylamine is obtained by reacting 3,4-dimethylaniline with 3,4-dimethylcyclohexanone in the presence of hydrogen transfer catalyst, for example palladium or the like, to produce 3,3',4,4'-tetramethyldiphenylamine and further reacting the resultant 3,3',4,4'- tetramethyldiphenylamine with 4-phenylcyclohexanone. |
