In examining for unique insecticidal agents, two derivatives namely, 2-((3-cyano-4,6-
distyrylpyridin-2-yl)thio)-N-(4-nitrophenyl)acetamide (2) and 3-amino-N-(4-nitrophenyl)-4,6-
distyrylthieno[2,3-b]pyridine-2-carboxamide (3) were synthesized from distyrylpyridine-2-
thione (1). The new compounds were structurally clarified by spectral and elemental analysis
data. The insecticidal activity of these compounds were carried out against cowpea aphid, Aphis
craccivora Koch. It is demonstrated that the compounds 2 and 3 have noteworthy insecticidal
activity against nymphs of cowpea aphid with LC50 values of 0.025-0.027 ppm and 0.005-0.006
ppm after 24 h and 48 h of treatment, respectively. Also, the compounds 2 and 3 have noteworthy
insecticidal activity against adults of cowpea aphid with LC50 values of 0.112-0.129 ppm and
0.014-0.015 ppm after 24 h and 48 h of treatment, respectively, that were comparable to that of
the control acetamiprid.