Solvent free catalysis synthesis of dibenzalpenlpentaerythritol under microwave irradiation

Dibenzalpenlpentaerythritol was efficiently synthesized from benzaldehyde and pentaerythritol under microwave irradiation and solvent free conditions with potassium bisulfate as catalyst. The effects of microwave irradiation time, microwave irradiation power, molar ratio, and catalyst amount on the yield of dibenzalpenlpentaerythritol were investigated. The results show that the optimum reaction conditions are as follows: microwave irradiation power is 465 W, radiation time is 5 min, benzaldehyde 30 mmol, pentaerythritol 15 mmol, potassium bisulfate 0.3 mmol, the yield is up to 84.5%.