Herein, an efficient and effective palladium salt was synthesized using the salt of 1-benzyl-4-aza-1-azoniabicyclo [2.2.2] octane chloride (n-benzyl DABCO chloride) and palladium chloride was investigated in the Stille reaction under conventional heating and microwave irradiation conditions. The complex was active and efficient catalyst for the Stille reaction of aryl halides. The yields were excellent using a catalytic amount of complex 1 in DMF at 120 °C. In the next section. Hiyama cross-coupling reaction of various aryl halides with triethoxy (phenyl) silane under conventional heating and microwave irradiation conditions were created the corresponding products in excellent yields in NMP as solvent and CsF as base at 120 °C. The symmetrical biaryls were obtained via homo-coupling reaction of various aryl halides in NMP as the solvent and K 2 CO 3 as base at 120 °C. In comparison to conventional heating conditions, the reactions under microwave irradiation gave higher yields in shorter reaction time, The catalyst has great activity in Sonogashira reaction.and The yields were good to excellent under optimized conditions , using piperidine as base, water as solvent at 60°C temperature.