Synthesis, biological evaluation and molecular docking studies of benzyloxyacetohydroxamic acids as LpxC inhibitors
摘要:
The inhibition of the UDP-3-O-[(R)-3-hydroxymyristoyl]-N-acetylglucosamine deacetylase (LpxC) represents a promising strategy to combat infections caused by multidrug-resistant Gram-negative bacteria. In order to elucidate the functional groups being important for the inhibition of LpxC, the structure of our previously reported hydroxamic acid 4 should be systematically varied. Therefore, a series of benzyloxyacetohydroxamic acids was prepared, of which the diphenylacetylene derivatives 28 (K-i = 95 nM) and 21 (K-i = 66 nM) were the most potent inhibitors of Escherichia coli LpxC. These compounds could be synthesized in a stereoselective manner employing a Sharpless asymmetric dihydroxylation and a Sonogashira coupling in the key steps. The obtained structure-activity relationships could be rationalized by molecular docking studies. (C) 2013 Elsevier Ltd. All rights reserved.
Anti-Selective Glycolate Aldol Additions with an Oxapyrone Boron Enolate
摘要:
GRAPHICSThe boron enolate of pyrone 2 undergoes asymmetric aldol reactions with aldehydes to give protected anti 1,2 diols 3. The pyrone is readily available from trans stilbene using asymmetric dihydroxylation. Yields for the aldol reaction range from 62 to 92% and the selectivities from 6:1 to >20:1 for the anti isomers, Protection and hydrogenolysis of the products can be used to remove the pyrone, giving differentially protected diol intermediates 12 that are amenable to multistep synthesis.
Synthesis, biological evaluation and molecular docking studies of benzyloxyacetohydroxamic acids as LpxC inhibitors
作者:Marina Szermerski、Jelena Melesina、Kanin Wichapong、Marius Löppenberg、Joachim Jose、Wolfgang Sippl、Ralph Holl
DOI:10.1016/j.bmc.2013.12.057
日期:2014.2
The inhibition of the UDP-3-O-[(R)-3-hydroxymyristoyl]-N-acetylglucosamine deacetylase (LpxC) represents a promising strategy to combat infections caused by multidrug-resistant Gram-negative bacteria. In order to elucidate the functional groups being important for the inhibition of LpxC, the structure of our previously reported hydroxamic acid 4 should be systematically varied. Therefore, a series of benzyloxyacetohydroxamic acids was prepared, of which the diphenylacetylene derivatives 28 (K-i = 95 nM) and 21 (K-i = 66 nM) were the most potent inhibitors of Escherichia coli LpxC. These compounds could be synthesized in a stereoselective manner employing a Sharpless asymmetric dihydroxylation and a Sonogashira coupling in the key steps. The obtained structure-activity relationships could be rationalized by molecular docking studies. (C) 2013 Elsevier Ltd. All rights reserved.
<i>Anti</i>-Selective Glycolate Aldol Additions with an Oxapyrone Boron Enolate
作者:Merritt B. Andrus、B. B. V. Soma Sekhar、Erik L. Meredith、N. Kent Dalley
DOI:10.1021/ol0002166
日期:2000.9.1
GRAPHICSThe boron enolate of pyrone 2 undergoes asymmetric aldol reactions with aldehydes to give protected anti 1,2 diols 3. The pyrone is readily available from trans stilbene using asymmetric dihydroxylation. Yields for the aldol reaction range from 62 to 92% and the selectivities from 6:1 to >20:1 for the anti isomers, Protection and hydrogenolysis of the products can be used to remove the pyrone, giving differentially protected diol intermediates 12 that are amenable to multistep synthesis.