Studies on antitumor-active 2,3-dioxopiperazine derivatives. III. Synthesis and structure-antitumor activity relationship of 1-(4-aminobenzyl)-2,3-dioxopiperazine derivatives.
Studies on antitumor-active 2,3-dioxopiperazine derivatives. III. Synthesis and structure-antitumor activity relationship of 1-(4-aminobenzyl)-2,3-dioxopiperazine derivatives.
The present investigation was undertaken to find more effective autitumor agents than 1-(4-diethylaminobenzyl)-4-n-hexyl-2, 3-dioxopiperazine (1), which was found in our laboratory in previous studies. 1-(4-Diethylamino-3- or 2-substituted benzyl)-2, 3-dioxopiperazine derivatives and 1-(4-substituted aminobenzyl)-2, 3-dioxopiperazine derivatives were designed and synthesized with the aim of suppressing the metabolism of the Et2N- group of 1. The structureactivity relationships and metabolism of these compounds were studied. It was found that 1-benzyl-4-[4-(2-pyrimidinylamino)benzyl]-2, 3-dioxopiperazine (17c) possessed the highest in vitro and in vivo activities.