Synthetic libraries of tyrosine-derived bacterial metabolites
作者:Savvas N. Georgiades、Jon Clardy
DOI:10.1016/j.bmcl.2007.10.058
日期:2008.5
The preparation of a collection of 131 small molecules, reminiscent of families of long chain N-acyl tyrosines, enamides and enol esters that have been isolatedfromheterologous expression of environmentalDNA (eDNA) in Escherichia coli, is reported. The synthetic libraries of N-acyl tyrosines and their 3-keto counterparts were prepared via solid-phase routes, whereas the enamides and enol esters
据报道,制备了 131 个小分子的集合,让人联想到长链 N-酰基酪氨酸、烯酰胺和烯醇酯家族,这些分子是从大肠杆菌环境 DNA (eDNA) 的异源表达中分离出来的。N-酰基酪氨酸及其3-酮对应物的合成库是通过固相途径制备的,而烯酰胺和烯醇酯是在溶液相中合成的。
Isolation of the antibiotic pseudopyronine B and SAR evaluation of C3/C6 alkyl analogs
作者:Leah M. Bouthillette、Catherine A. Darcey、Tess E. Handy、Sarah C. Seaton、Amanda L. Wolfe
DOI:10.1016/j.bmcl.2017.04.067
日期:2017.6
for antibacterial activity againstGram-positive and Gram-negative bacteria. We found a direct relationship between antibacterial activity and C3/C6 alkyl chain length. For inhibition of Gram-positive bacteria, alkyl chain lengths between 6 and 7 carbons were found to be the most active (IC50=0.04-3.8µg/mL) whereas short alkyl chain analogs showed modest activity against Gram-negative bacteria (IC50=223-304µg/mL)
The present invention relates to new compounds of formula (I), (II), or (III)
wherein R
1
, R
2
, R
3
, R
4
, R
5
and W are as defined herein, and methods of using the compounds to inhibit PAI-1 and to treat PAI-1 related disorders.
Synthetic Analogues of the Bacterial Signal (Quorum Sensing) Molecule <i>N</i>-(3-Oxododecanoyl)-<scp>l</scp>-homoserine Lactone as Immune Modulators
作者:Siri Ram Chhabra、Chris Harty、Doreen S. W. Hooi、Mavis Daykin、Paul Williams、Gary Telford、David I. Pritchard、Barrie W. Bycroft
DOI:10.1021/jm020909n
日期:2003.1.1
Comparative immune modulatory activity for a range of synthetic analogues of a Pseudomonas aeruginosa signal molecule, N-(3-oxododecanoyl)-L-homoserine lactone (3O, C-12-HSL), is described. Twenty-four single or combination systematic alterations of the structural components of 3O, C12-HSL were introduced as described. Given the already defined immunological profile of the parent compound, 3O, C12-HSL, these compounds were assayed for their ability to inhibit murine and human leucocyte proliferation and TNF-alpha secretion by lipopolysaccharide (LPS) stimulated human leucocytes in order to provide an initial structure-activity profile. From IC50 values obtained with a murine splenocyte proliferation assay, it is apparent that acylated L-homoserine lactones with an 11-13 C side chain containing either a 3-oxo or a 3-hydroxy group are optimal structures for immune suppressive activity. These derivatives of 3O, C-12-HSL with monounsaturation and/or a terminal nonpolar substituent on the side chain were also potent immune suppressive agents. However, structures lacking the homoserine lactone ring, structures lacking the L-configuration at the chiral center, and those with polar substituents were essentially devoid of activity. The ability of compounds selected from the optimal activity range to modulate mitogen-driven human peripheral blood mononuclear cell proliferation and LPS-induced TNF-alpha secretion indicates the suitability of these compounds for further investigation in relation to their molecular mechanisms of action in TNF-alpha driven immunological diseases, particularly autoimmune diseases such as psoriasis, rheumatoid arthritis, and type 1 (autoimmune) diabetes.
Novel amides and esters prodrugs of olmesartan: Synthesis, bioconversion, and pharmacokinetic evaluation
作者:Jin-Hun Park、Jeong-Soo Chang、Mohammed I. El-Gamal、Won-Kyoung Choi、Woong San Lee、Hye Jin Chung、Hyun-Il Kim、Young-Jin Cho、Bong Sang Lee、Hong-Ryeol Jeon、Yong Sup Lee、Young Wook Choi、Jaehwi Lee、Chang-Hyun Oh
DOI:10.1016/j.bmcl.2010.07.089
日期:2010.10
Synthesis of novel amides and esters prodrugs of olmesartan is described. Their in vitro stability in rat plasma was tested. The results showed that the ester derivative IIa with n-octyl substituted dioxolone moiety was rapidly converted into olmesartan within 30 min. The pharmacokinetic parameters of IIa were studied and compared with those of olmesartan medoxomil. Compound IIa is proposed to be a promising prodrug of olmesartan. (C) 2010 Published by Elsevier Ltd.