Facile and efficient synthesis of functionalized iminothiopyran and isothiochromen via one-pot multicomponent reactions

Synthesis of polysubstituted 3,4-dihydro-2H-thiopyrans by regioselective annulation of 3,3-disubstituted allylic alcohols with a β-oxodithioester

Polyfunctionalized 3,4-dihydro-2H-thiopyrans were obtained in high yields via the regioselective annulation of 3,3-disubstituted allylic alcohols with a β-oxodithioester under BF₃·Et₂O catalysis.

Antiproliferative activity of novel derivative of thiopyran on breast and colon cancer lines and DNA binding

Dimethyl-5-acetyl-4-methyl-6-(4-methylphenylimino)-6H-thiopyran-2,3-dicarboxylate (4) has been synthesized and its antiproliferative activity is reported here. Compound 4 inhibited the growth of human colon cancer cell line HCT-15 with an IC(50) value of 3.5 μM and of breast cancer cell line MCF-7 with an IC(50) value of 1.5 μM in a dose/time-dependent manner using a sulforhodamine B assay. Moreover, suppression of clonogenic activity occurred after exposure to 4 at a concentration of 4 μM for HCT-15 and 1.7 μM for MCF-7. The results also showed tumor cell invasion through matrigel and cell adhesion. The effect of ligand complexation on DNA structure led to overall affinity constant of K(4-DNA)=9.8×10(4) M(-1).