The tetracycline class of antibiotics has played a major role in the treatment of infectious diseases for the past 50 years. However, the increased use of the tetracyclines in human and veterinary medicine has led to resistance among many organisms previously susceptible to tetracycline antibiotics. The recent development of a modular synthesis of tetracycline analogs through a chiral enone intermediate has allowed for the efficient synthesis of novel tetracycline analogs never prepared before. The present invention provides more efficient routes for preparing the enone intermediate and allows for substituents at positions 4a, 5, 5a, and 12a of the tetracycline ring system.
四环素类抗生素在过去50年中在治疗传染病方面发挥了重要作用。然而,
四环素类抗生素在人类和兽医药学中的增加使用已导致许多以前对
四环素类抗生素敏感的
生物产生耐药性。最近通过手性烯酮中间体的模块化合成开发了新型
四环素类似物的方法,使得以前从未制备过的新型
四环素类似物的高效合成成为可能。本发明提供了更有效的制备烯酮中间体的途径,并允许在
四环素环系统的4a、5、5a和12a位置上进行取代。