衍生自N-取代的(2-氯乙酰胺基)丙二酸二烷基偶氮丙二酸酯的碱处理导致形成4-取代的5-氧代-1,4,5,6-四氢-1,2,4-三嗪-3-羧酸烷基酯。相同的丙二酸酯与重氮化的2-氨基-5-氯二苯甲酮或邻氨基苯甲酸甲酯偶合,得到三嗪酮,其可以环化成新的三嗪并[1,6- a ]吲哚。两个代表性的杂环的特征还在于典型的反应。氧化产生相应的三嗪-5,6-二酮,还原的结果强烈取决于C(4)上取代基的性质。溴化之后进行水后处理,产生6-羟基衍生物。讨论了这种新颖的三嗪酮合成的一些机理方面。
Synthesis of Indoleamine 2,3-Dioxygenase Inhibitory Analogues of the Sponge Alkaloid Exiguamine A
摘要:
Synthetic analogues of the sponge natural product exiguamine A (3) have been prepared and evaluated for their ability to inhibit indoleamine 2,3-dioxygenase in vitro.
Provided is a novel compound which is useful as a pharmaceutical composition by inhibiting an LpxC activity, thereby exhibiting potent antimicrobial activity against gram-negative bacteria including
Pseudomonas aeruginosa
and its drug resistant bacteria. Provided is a hydroxamic acid derivative represented by the following general formula [1] or a pharmaceutically acceptable salt thereof:
Provided is a novel compound which is useful as a pharmaceutical composition by inhibiting an LpxC activity, thereby exhibiting potent antimicrobial activity against gram-negative bacteria including Pseudomonas aeruginosa and its drug resistant bacteria. Provided is a hydroxamic acid derivative represented by the following general formula [1] or a pharmaceutically acceptable salt thereof:
Probing ergot alkaloid biosynthesis: synthesis and feeding of a proposed intermediate along the biosynthetic pathway. A new amidomalonate for tryptophan elaboration
作者:Alan P. Kozikowski、Makoto Okita、Motomasa Kobayashi、Heinz G. Floss