A series of novelpyrido[3,2‐e]tetrazolo[1,5‐c]pyrimidinederivative 4 were synthesized starting from 2‐amino‐4‐trifluoromethyl‐6‐phenyl nicotinonitrile 1 via construction of tetrazole followed by fusion of pyrimidine ring. All final products were screened for antibacterial and antifungal activities.