In the first part of this thesis, the formation of cyclobutyenes forms on the pathway of oxidative beta-ketone esters with dimethylformamide, in the vicinity of FeCl2.4H2O as a catalyst and TBHP as oxidation Green is formulated in dimethyl formate as a high-efficiency solvent. In the second part, the formation of an amide bond with the help of the representative of the TCT coupling with carboxylic acids in the vicinity of the Et3N open probe with a good efficiency in the solvent of Chlorinic chloride / urea, which has a biodegradability and a suitable substitute for organic solvents, is carried out.