A PRACTICAL SYNTHETIC ROUTE TO THE TETRACYCLINES

描述：（主要研究者摘要）本提案的目的 是建立第一个实用、高效和对映选择性的实验室， 四环素类抗生素的合成途径。我们的目标是设计一个 合成路线为12步或更少的合成步骤，可能少至8步， 以苯甲酸作为起始原料开始。一个约束， 合成路线也是通用的，允许引入 后期阶段的实质性结构变化，特别是在C 和四环素结构的D环，先前的研究表明， 抗生素的发展有很大的机会。合成一个广泛的 一系列新的四环素类抗生素作为改进的抗生素进行评价， 提出了潜在的抗肿瘤剂。一个特别的重点是发展 对四环素耐药微生物有效的抗生素。 调整和/或修饰这些合成路线以靶向新的 具有抗肿瘤活性的四环素结构，如SF-2575（TAN-1518 X） 也将尝试。

DESCRIPTION: (Principal Investigator's Abstract) The objective of this proposal is to develop the first practical, efficient, and enantioselective laboratory synthetic route(s) to the tetracycline antibiotics. The goal is to devise a route of twelve or fewer synthetic steps, perhaps as few as eight steps, beginning with benzoic acid as a starting material. A constraint that the synthetic route be versatile is also imposed, allowing for the introduction of substantive structural variability at a late stage, particularly within the C and D rings of the tetracycline structure, where prior research has shown that there is great opportunity for antibiotic development. Synthesis of a wide range of new tetracyclines for evaluation as improved antibiotics and, potentially antitumor agents is proposed. A particular focus is the development of effective antibiotics against tetracycline-resistant microorganisms. Adaptation and/or modification of these synthetic routes to target new tetracycline structures with antitumor activity, such as SF-2575 (TAN-1518 X) will also be attempted.