Novel applications of carbon dioxide/MeOH for the synthesis of hydantoins and cyclic ureas via the Ugi reaction
摘要:
This communication reveals novel applications of the CO2/MeOH reagent combination coupled with the UDC (Ugi/DeBOC/Cyclize) strategy. The Ugi five component condensation (5CC) affords carbamate protected amino-amides in good yield. When one of the supporting reagents employed in the Ugi reaction possesses a tethered amino-BOC protected functional group, subsequent acid treatment and proton scavenging results in rapid cyclization to cyclic ureas. Additionally, treatment of the 5CC product with base affords hydantoins in good yield, representing a novel and short approach to this class of molecule. (C) 2000 Elsevier Science Ltd. All rights reserved.
Potent Anti-SARS-CoV-2 Activity by the Natural Product Gallinamide A and Analogues via Inhibition of Cathepsin L
作者:Anneliese S. Ashhurst、Arthur H. Tang、Pavla Fajtová、Michael C. Yoon、Anupriya Aggarwal、Max J. Bedding、Alexander Stoye、Laura Beretta、Dustin Pwee、Aleksandra Drelich、Danielle Skinner、Linfeng Li、Thomas D. Meek、James H. McKerrow、Vivian Hook、Chien-Te Tseng、Mark Larance、Stuart Turville、William H. Gerwick、Anthony J. O’Donoghue、Richard J. Payne
DOI:10.1021/acs.jmedchem.1c01494
日期:2022.2.24
SARS-CoV-2. The marine naturalproduct gallinamide A and several synthetic analogues were identified as potent inhibitors of cathepsin L with IC50 values in the picomolar range. Lead molecules possessed selectivity over other cathepsins and alternative host proteases involved in viral entry. Gallinamide A directly interacted with cathepsin L in cells and, together with two lead analogues, potently inhibited
组织蛋白酶 L 是冠状病毒用于进入细胞的关键宿主半胱氨酸蛋白酶,也是新型抗 SARS-CoV-2 病毒药物的一个有前景的药物靶点。海洋天然产物 Gallinamide A 和几种合成类似物被鉴定为组织蛋白酶 L 的有效抑制剂,IC 50值在皮摩尔范围内。先导分子比参与病毒进入的其他组织蛋白酶和替代宿主蛋白酶具有选择性。 Gallinamide A 直接与细胞中的组织蛋白酶 L 相互作用,并与两种先导类似物一起在体外有效抑制 SARS-CoV-2 感染,EC 50值在纳摩尔范围内。在过表达跨膜蛋白酶丝氨酸 2 (TMPRSS2) 的细胞中观察到抗病毒活性降低;然而,当与 TMPRSS2 抑制剂联合使用时,可以实现抗病毒活性的协同改善。这些数据凸显了组织蛋白酶 L 作为 COVID-19 药物靶点的潜力,以及可能需要抑制多种病毒进入途径才能发挥功效。
Synthesis and structure–activity relationships of novel IKK-β inhibitors. Part 2: Improvement of in vitro activity
作者:Toshiki Murata、Mitsuyuki Shimada、Hiroshi Kadono、Sachiko Sakakibara、Takashi Yoshino、Tsutomu Masuda、Makoto Shimazaki、Takuya Shintani、Kinji Fuchikami、Kevin B Bacon、Karl B Ziegelbauer、Timothy B Lowinger
DOI:10.1016/j.bmcl.2004.05.040
日期:2004.8
A series of 2-amino-3-cyano-4-alkyl-6-(2-hydroxyphenyl)pyridine derivatives was synthesized and evaluated as IkappaB kinase beta (IKK-beta) inhibitors. Substitution of an aminoalkyl group for the aromatic group at the 4-position on the core pyridine ring resulted in a marked increase in both kinase enzyme and cellular potencies, and provided potent IKK-beta inhibitors with IC(50) values of below 100
There are provided novel 1,4-diamine-2,3-dihydroxybutanes useful as antiviral agents, pharmaceutical compositions containing them and processes for preparing such compounds.