Bis‐Cyclic Guanidines as a Novel Class of Compounds Potent against
<i>Clostridium difficile</i>
作者:Chunhui Li、Peng Teng、Zhong Peng、Peng Sang、Xingmin Sun、Jianfeng Cai
DOI:10.1002/cmdc.201800240
日期:2018.7.18
bis‐cyclic guanidine compounds that show potent antibacterial activity against C. difficile with decent selectivity. Eight compounds showed high in vitro potency against C. difficile UK6 with MIC values of 1.0 μg mL−1, and cytotoxic selectivity index (SI) values up to 37. Moreover, the most selective compound is also effective in the treatment of C. difficile‐induced disease in a mouse model of CDI
Tripeptide analogues of MG132 as protease inhibitors
作者:Ashok D. Pehere、Steven Nguyen、Sarah K. Garlick、Danny W. Wilson、Irene Hudson、Matthew J. Sykes、James D. Morton、Andrew D. Abell
DOI:10.1016/j.bmc.2018.12.022
日期:2019.1
proteasome and calpain are linked to a number of important human diseases. Here, we report a series of analogues of the prototypical tripeptide aldehyde inhibitor MG132 that show a unique combination of high activity and selectivity for calpains over proteasome. Tripeptide aldehydes (1–3) with an aromatic P3 substituent show enhanced activity and selectivity against ovine calpain 2 relative to chymotrypsin-like
Disclosed herein is a method for regulating the activity of NF-&kgr;B in an animal comprising contacting cells of the animal with certain proteasome inhibitors.
Total synthesis of optically active deoxyaspergillic acid from dipeptidyl aldehyde
作者:Yoshio Okada、Hiroaki Taguchi、Toshio Yokoi
DOI:10.1016/0040-4039(96)00267-5
日期:1996.3
Opticallyactive deoxyaspergillic acid was easily synthesized by a newly developed procedure for preparation of 2(1H)-pyrazinone derivatives from l-leucyl-l-isoleucine aldehyde hydrochloride (H-l-Leu-l-Ile-H·HCl).
[GRAPHICS]A new sequence for the synthesis of various 2,4-disubstituted oxazoles from alpha-amino acids is reported. The method is shown to be general and incorporates the reagent combination, triphenylphosphine/hexachloroethane, for cyclodehydration of intermediate alpha-acylamino aldehydes. Implementation of this reagent system for the conversion of alpha-acylamino ketones to oxazoles is briefly investigated.