In this thesis, the synthesis of 3,6-diisocyanate acridine, thiourea derivative and bisguanidine are presented. The basis for these compounds are acridine, guanidine and thiourea molecules. Acridine is an organic compound and a nitrogen heterocyclic with the formula C13H9N. It is a planar molecule that is structurally similar to anthracene with one central CH group replaced by nitrogen. Guanidine is a compound with the chemical formula of CH5N3. It is a colourless solid that dissolves in polar solvents and it is also a strong base that is used in the production of plastic and explosives. In urine, it is found as a normal product of the protein metabolism. Guanidine is a functional group on the side chain of arginine. Guanidine can be thought of as the nitrogen analogue of the carbonic acid. Thiourea is an organosulfur compound with the formula SC(NH2)2, structurally it is similar to urea, but in this case the oxygen atom is replaced with a sulfur atom. The methods used in the synthesis are NMR (nuclear magnetic resonance spectroscopy), thin layer chromatography and column chromatography. Every product of the reaction was first tested with thin layer chromatography so that the course of the reaction could be determined. Afterwards it was tested with the NMR device to see if the product has appeared and were there any impurities present. The sample containing the impurities was purified with column chromatography and re-tested with the NMR device. The 3,6-diisocyanate acridine and thiourea molecules were successfully synthesised, while for the bisguanidine molecule it is not possible to tell with certainty if it was obtained or not, further tests are necessary to confirm the synthesis.