A series of 3-substitutedphenyl-1-thia-tetrazopentaleno[1,2-b] naphthalene4(a-d)and 2-substitutedphenyl-1-thia-pentazopentaleno[1,2-b] naphthalene5(a-d)were synthesizedvia., the reaction of 2-aminothiazoles2(a-d)and 2-aminothiadiazoles3(a-d)with 2,3-dichloro quinoxaline1in ionic liquid without using any catalyst. This protocol has the advantages of easier workup, milder reaction conditions, high yields, and environmentally benign procedure over traditional methods. The synthesized compounds4(a-d)and5(a-d)tested for their anti-fungal activity and these compounds were characterized by IR, NMR and Mass spectral analysis.