99248-68-7Relevant academic research and scientific papers
Cathepsin B inhibitors: Further exploration of the nitroxoline core
Sosi?, Izidor,Mitrovi?, Ana,?uri?, Hrvoje,Knez, Damijan,Brodnik ?ugelj, Helena,?tefane, Bogdan,Kos, Janko,Gobec, Stanislav
supporting information, p. 1239 - 1247 (2018/03/05)
Human cathepsin B is a cysteine protease with many house-keeping functions, such as intracellular proteolysis within lysosomes. Its increased activity and expression have been strongly associated with many pathological processes, including cancers. We present here the design and synthesis of novel derivatives of nitroxoline as inhibitors of cathepsin B. These were prepared either by omitting the pyridine part, or by modifying positions 2, 7, and 8 of nitroxoline. All compounds were evaluated for their ability to inhibit endopeptidase and exopeptidase activities of cathepsin B. For the most promising inhibitors, the ability to reduce extracellular and intracellular collagen IV degradation was determined, followed by their evaluation in cell-based in vitro models of tumor invasion. The presented data show that we have further defined the structural requirements for cathepsin B inhibition by nitroxoline derivatives and provided additional knowledge that could lead to non-peptidic compounds with usefulness against tumor progression.
Decarboxylated Methoxatin Analogues. Synthesis of 7- and 9-Decarboxymethoxatin
Noar, J. Barry,Bruice, Thomas C.
, p. 1942 - 1945 (2007/10/02)
A total synthesis of two monodecarboxylated analogues of methoxatin (1) is described.The synthesis of 9-decarboxymethoxatin (4) was achieved starting with 8-hydroxyquinoline, constructing an appropriately substituted quinolylhydrazone of ethyl pyruvate with a Japp-Klingemann reaction and annulating the remaining pyrrole ring through a Fischer indole synthesis.The synthesis of 7-decarboxymethoxatin (3) first necessitated the construction of an appropriate indole from which the remaining pyridine ring could be annulated via a Doebner reaction.
