the invention relates to the field of organic and medicinal chemistry , and molecular biology , and concerns a method for the preparation of a new class of telomerase - inhibiting compounds , which can be utilized for studying telomerases and catalytic sub - units of telomerases , and reverse transcriptases , and foe studying and treating neoplastic and viral diseases . telomerase - inhibiting coordination compounds of derivatives of imidazol - 4 - one are characterized by general formula