Synthesis and Antitumor and Antibacterial Activity of Novel Dihydronaphthaline and Dihydrobenzo[H]Quinazoline Derivatives

A method for the synthesis of 1-amino-3,3-dimethyl-3,4-dihydronaphthaline-2-carbonitrile (β-aminonitrile) was developed and used to synthesize Schiff bases, thioureide and chloracetamide derivatives. This latter was cyclized to 5,5-dimethyl-2-chloromethyl-5,6-dihydrobenzo[h]quinazoline-4(3H)-one, which was used to synthesize a series of 2-sulfanylmethyl and 2-aminomethyl derivatives. 2-Chloromethylbenzo[h]quinazoline in the presence of a base was found to form condensed heterocyclic compounds with seven rings: 1,1,11,11-tetramethyl-1,2,11,12-tetrahydropyrazino[2,1-b:5,4-b′]di(benzo[h]quinazoline)-10,16(8H,18H)-di one. The antitumor properties of the compounds synthesized here were studied in an ascites carcinoma model and the antibacterial properties were studied using the agar diffusion method.