Synthesis, hydrolysis rates, supercomputer modeling, and antibacterial activity of bicyclic tetrahydropyridazinones
作者:Louis N. Jungheim、Donald B. Boyd、Joseph M. Indelicato、Carol E. Pasini、David A. Preston、William E. Alborn
DOI:10.1021/jm00109a030
日期:1991.5
electron-withdrawing groups, were synthesized to investigate their antibacterial activity. These delta-lactams are homologues of bicyclic pyrazolidinones 15, which were the first non-beta-lactam containing compounds reported to bind to penicillin-binding proteins (PBPs). The delta-lactam compounds exhibit poor antibacterial activity despite having reactivity comparable to the gamma-lactams. Molecular modeling
合成了双环四氢吡啶并壬酮,例如13,其中X是强吸电子基团,以研究其抗菌活性。这些δ-内酰胺是双环吡唑啉酮15的同源物,其是第一种不含β-内酰胺的化合物,据报道与青霉素结合蛋白(PBP)结合。δ-内酰胺化合物尽管具有与γ-内酰胺相当的反应性,但仍显示出较差的抗菌活性。基于在Cray X-MP超级计算机上进行的半经验分子轨道计算的分子模型,预测无活性的原因是空间体积大,阻碍了化合物对PBP的高亲和力,以及四氢哒嗪酮环的高构象柔韧性妨碍了化合物的有效排列。分子在活性位点。