| abstract |
An industrially advantageous method for producing an optically active 1,2-bis(dialkylphosphino)benzene derivative of the present invention is provided. The method is characterized in that a phosphine-borane compound represented by the following general formula (1) is subjected to a deboronation reaction, followed by lithiation, then the reaction product is subjected to reaction with an alkyldihalogenophosphine represented by R a PX′ 2 , and thereafter the reaction product is subjected to reaction with a Grignard reagent represented by R b MgX″ to produce an optically active 1,2-bis(dialkylphosphino)benzene derivative (A). R 1 and R 2 respectively represent an alkyl group having 1 to 8 carbon atoms, and the number of carbon atoms is different between R 1 and R 2 . R a is either R 1 or R 2 and R b is the other of R 1 and R 2 . X, X′, and X″ each represent a halogen atom. |