Chiral phase transfer catalysis is an important branch of asymmetric catalysis, which plays an increasingly important role. Currently, the development of quaternary ammonium salt phase transfer catalyst is majorly focus on sp3 hybridized nitrogen, while the development of sp2 hybridized phase transfer catalyst of quaternary ammonium salts is rare. On the basis of our previous work, this paper use (1S,2S)-1,2-diphenyl ethylenediamine as starting material through 5-6 steps to prepare SP2 hybridized model C2 symmetric phase transfer catalyst Pentanidium，1H NMR、13C NMR and HRMS were used to verify the chemical structure
