A newclass of amido linked azolyl thiophenes was prepared from the synthetic intermediates azolyl amines and 5‐chlorothiophene‐2‐carbonyl chloride adopting conventional and ultrasonication methodologies. It was observed that the reaction took place in shorter reaction times with higher yields under ultrasonication. The structures of the synthesized compounds were characterized by spectral parameters
A Simple and Practical Synthesis of 2-Aminoimidazoles
作者:Thomas L. Little、Stephen E. Webber
DOI:10.1021/jo00103a021
日期:1994.12
A new and simple two-step procedure to synthesize 2-aminoimidazoles (2-AI's) from readily available materials has been developed. The cyclization reaction of alpha-halo ketones and N-acetylguanidine in acetonitrile (MeCN) at reflux, or in dimethylformamide (DMF) at ambient temperature, gives 4(5)-substituted and 4,5-disubstituted N-(1H-imidazol-2-yl)acetamides, which are then hydrolyzed to their respective 2-AI's. In general, the purified products were isolated in good yields. We have prepared several examples and have demonstrated the usefulness of this method by its application in the total synthesis of 8, an interesting histamine analog, and oroidin, 15, a marine natural product isolated from various sponges.
Fragment-Based Approach to Targeting Inosine-5′-monophosphate Dehydrogenase (IMPDH) from <i>Mycobacterium tuberculosis</i>
作者:Ana Trapero、Angela Pacitto、Vinayak Singh、Mohamad Sabbah、Anthony G. Coyne、Valerie Mizrahi、Tom L. Blundell、David B. Ascher、Chris Abell
DOI:10.1021/acs.jmedchem.7b01622
日期:2018.4.12
dehydrogenase (IMPDH), a crucial enzyme required for denovo synthesis of guanine nucleotides, is an attractive TB drug target. Herein, we describe the identification of potent IMPDH inhibitors using fragment-based screening and structure-based design techniques. Screening of a fragment library for Mycobacterium thermoresistible ( Mth) IMPDH ΔCBS inhibitors identified a low affinity phenylimidazole derivative
结核病 (TB) 仍然是全世界死亡的主要原因,需要改进治疗以对抗耐药性的出现。肌苷 5'-单磷酸脱氢酶 (IMPDH) 是从头合成鸟嘌呤核苷酸所需的关键酶,是一种有吸引力的结核病药物靶点。在这里,我们描述了使用基于片段的筛选和基于结构的设计技术来鉴定有效的 IMPDH 抑制剂。筛选耐热分枝杆菌 (Mth) IMPDH ΔCBS 抑制剂的片段库确定了一种低亲和力苯基咪唑衍生物。第 M 个 IMPDH ΔCBS-IMP-抑制剂复合物的 X 射线晶体学显示该片段的两个分子结合在 IMPDH 的 NAD 结合口袋中。