Synthesis and biological evaluation of 9- N -oxamyl sialosides as Siglec-7 ligands
摘要:
Siglecs (sialic acid recognizing immunoglobulin like lectins) are a family of lectins with specificity for sialic acid containing carbohydrates. Synthetic sialic acid derivatives with high affinity proved useful to unravel the biological role of the ligand binding domain, although many of their functions in immunity remain unknown. Here we present design, synthesis, affinity evaluation and molecular modeling of novel 9-N-oxamoyl modified sialosides as Siglec-7 ligands. (C) 2015 Elsevier Ltd. All rights reserved.
Oxamic acid analogues as LDH-C4-specific competitive inhibitors
摘要:
We performed kinetic studies to determine whether oxamate analogues are selective inhibitors of LDH-C4, owing to their potential usefulness in fertility control and treatment of some cancers. These substances were shown to be competitive inhibitors of LDH isozymes and are able to discriminate among subtle differences that differentiate the active sites of LDH-A4, LDH-B4 and LDH-C4. N-Ethyl oxamate was the most potent inhibitor showing the highest affinity for LDH-C4. However, N-propyl oxamate was the most selective inhibitor showing a high degree of selectivity towards LDH-C4. Non-polar four carbon atoms chains, linear or branched, dramatically diminished the affinity and selectivity towards LDH-C4. N-Propyl oxamate significantly reduced ATP levels, capacitation and mouse sperm motility, in line with results shown by others, suggesting that LDH-C4 plays an essential role in mouse fertility.
Disclosed herein are compounds of Formula I′:
or a stereoisomer or a tautomer thereof, or a pharmaceutically acceptable salt thereof, pharmaceutical compositions comprising such compounds, and methods of treating disease by administering or contacting a patient with one or more of the above compounds.
Urban, Archiv der Pharmazie, 1904, vol. 242, p. 62
作者:Urban
DOI:——
日期:——
Synthesis, Crystal Structure, and Insecticidal Activity of Novel <i>N</i>-Alkyloxyoxalyl Derivatives of 2-Arylpyrrole
作者:Yu Zhao、Chunhui Mao、Yongqiang Li、Pengxiang Zhang、Zhiqiang Huang、Fuchun Bi、Runqiu Huang、Qingmin Wang
DOI:10.1021/jf801311h
日期:2008.8.1
Two series of novel N-alkyloxyoxalyl derivatives of 2-arylpyrrole were synthesized, and their structures were characterized by (1)H NMR spectroscopy, elemental analysis, and single-crystal X-ray diffraction analysis. The insecticidal activities of the new compounds were evaluated. The results of bioassays indicated that some of these title compounds exhibited excellent insecticidal activities, and their insecticidal activities against oriental armyworm, mosquito, and spider mite are comparable to those of the commercialized Chlorfenapyr.
Oxamic acid analogues as LDH-C4-specific competitive inhibitors
作者:Lorena Rodríguez-Páez、Miguel Angel Chena-Taboada、Arturo Cabrera-Hernández、Joaquín Cordero-Martínez、Carlos Wong
DOI:10.3109/14756366.2011.566221
日期:2011.8.1
We performed kinetic studies to determine whether oxamate analogues are selective inhibitors of LDH-C4, owing to their potential usefulness in fertility control and treatment of some cancers. These substances were shown to be competitive inhibitors of LDH isozymes and are able to discriminate among subtle differences that differentiate the active sites of LDH-A4, LDH-B4 and LDH-C4. N-Ethyl oxamate was the most potent inhibitor showing the highest affinity for LDH-C4. However, N-propyl oxamate was the most selective inhibitor showing a high degree of selectivity towards LDH-C4. Non-polar four carbon atoms chains, linear or branched, dramatically diminished the affinity and selectivity towards LDH-C4. N-Propyl oxamate significantly reduced ATP levels, capacitation and mouse sperm motility, in line with results shown by others, suggesting that LDH-C4 plays an essential role in mouse fertility.
Synthesis and biological evaluation of 9- N -oxamyl sialosides as Siglec-7 ligands
Siglecs (sialic acid recognizing immunoglobulin like lectins) are a family of lectins with specificity for sialic acid containing carbohydrates. Synthetic sialic acid derivatives with high affinity proved useful to unravel the biological role of the ligand binding domain, although many of their functions in immunity remain unknown. Here we present design, synthesis, affinity evaluation and molecular modeling of novel 9-N-oxamoyl modified sialosides as Siglec-7 ligands. (C) 2015 Elsevier Ltd. All rights reserved.