Total Synthesis and Antimalarial Activity of Symplostatin 4
作者:Trent Conroy、Jin T. Guo、Nicholas H. Hunt、Richard J. Payne
DOI:10.1021/ol1024663
日期:2010.12.3
The first total synthesis of symplostatin 4, a marine cyanobacterium-derived natural product, is described. Notable features of the route include the efficient preparation of three key fragments and final assembly to the natural product via sequential imide and amide couplings. Symplostatin 4 was also demonstrated to possess significant antimalarial activity (ED50 of 74 nM against Plasmodium falciparum
Total Synthesis, Stereochemical Assignment, and Antimalarial Activity of Gallinamide A
作者:Trent Conroy、Jin T. Guo、Roger G. Linington、Nicholas H. Hunt、Richard J. Payne
DOI:10.1002/chem.201102538
日期:2011.11.25
The totalsynthesis and stereochemicalassignment of gallinamide A, an antimalarial depsipeptide of cyanobacterial origin, is described. Synthesis of the four possible N‐terminal diastereoisomers of gallinamide A (including the natural product symplostatin 4) was achieved using a divergent strategy from a common imide fragment. The natural product and corresponding diastereoisomers were synthesized
3-enoyltetronates and -tetramates as occurring in natural products, the 1′-methoxy isomers 8 and 9 are typically unreactive bisacyl ylides. This was rationalised by an X-ray structural analysis and abinitio calculations. However, the formal Wittig products of 8 and 9 are accessible in two steps via Wittig olefination of ylides 4/5 followed by 1′-O methylation of the resulting alkenes.
Second generation synthesis of the anti-infective natural product gallinamide A
作者:Arthur H. Tang、Richard J. Payne
DOI:10.1016/j.tet.2023.133445
日期:2023.6
potent anti-parasitic activity through the inhibition of essential cysteine protease enzymes. Recently, gallinamide A was also shown to possess potent antiviralactivity against SARS-CoV-2 via the covalent inhibition of the host cysteine protease cathepsin L that plays a role in viral entry. In order to perform detailed pre-clinical studies on gallinamide A as a potential antiviral for COVID-19, access
Gallinamide A 是一种由蓝藻产生的缩肽天然产物,通过抑制必需的半胱氨酸蛋白酶具有有效的抗寄生虫活性。最近,gallinamide A 还被证明对 SARS-CoV-2 具有强大的抗病毒活性在病毒进入中起作用的宿主半胱氨酸蛋白酶组织蛋白酶 L 的共价抑制。为了对 gallinamide A 作为 COVID-19 的潜在抗病毒药物进行详细的临床前研究,需要获得大量的天然产物,并且需要设计更有效的天然产物合成路线。在此,我们描述了第二代 gallinamide A 的全合成,它以 315 mg 的规模提供天然产物,共 16 个步骤(最长线性序列中的 9 个步骤),总产率为 32%。
TYK2 inhibitors and uses thereof
申请人:Nimbus Lakshmi, Inc.
公开号:US10023571B2
公开(公告)日:2018-07-17
The present invention provides compounds of formula I,
compositions thereof, and methods of using the same for the inhibition of TYK2, and the treatment of TYK2-mediated disorders.
本发明提供了式 I 的化合物、
及其组合物,以及用其抑制 TYK2 和治疗 TYK2 介导的疾病的方法。