Synthesis of polyhydroxylated aromatics having amidation of piperazine nitrogen as HIV-1 integrase inhibitor.

(E)-N-[3-(4-cinnamoylpiperazin-1-yl)propyl]-3,4-dihydroxybenzamide and (E)-N-[3-(4-cinnamoylpiperazin-1-yl)propyl]-3,4,5-trihydroxybenzamide were designed and synthesized as potential HIV-1 integrase inhibitors and evaluated their inhibition to the strand transfer process of HIV-1 integrase. The result indicates that 3,4,5-trihydroxylated aromatic derivatives exhibit good inhibition to HIV-1 integrase, however, corresponding 3,4-dihydroxylated aromatic derivatives appear little inhibition of HIV-1 integrase.