Synthesis and antiviral activity of novel glycyrrhizic acid conjugates with D-amino acid esters
摘要:
Glycyrrhizic acid (GA) conjugates with methyl and ethyl esters of D-amino acids (D-Trp, D-Phe, D-Tyr, D-Val, D-Leu) have been synthesized by the activated esters method using mixtures of N-hydroxybenzotriazole or N-hydroxysuccinimide with N,N'-dicyclohexylcarbodiimide. GA conjugate with D-Trp ethyl ester exhibited antiviral activity against influenza viruses A/H3N2, A/H1N1/pdm09, A/H5N1, B (SI > 10-29), and HRSV (SI > 25). GA conjugate with D-Trp methyl ester inhibited influenza virus A/H1N1/pdm09 (SI > 30).
N6-SUBSTITUTED ADENOSINE DERIVATIVES AND N6-SUBSTITUTED ADENINE DERIVATIVES AND USES THEREOF
申请人:Shi Jiangong
公开号:US20130045942A1
公开(公告)日:2013-02-21
The present invention provides N
6
-substituted adenosine derivatives and N
6
-substituted adenine derivatives, manufacturing methods thereof, a pharmaceutical composition comprising the said compounds above, and uses of these compounds in manufacturing medicaments and health-care products for treating insomnia, convulsion, epilepsy, and Parkinson's diseases, and preventing and treating dementia.
To activate HIF exogenously, without exposing cells to hypoxic conditions, many small-molecule inhibitors targeting prolylhydroxylase domain-containing protein have been developed. In addition, suppression of factor inhibiting HIF-1 (FIH-1) has also been shown to have the potential to activate HIF-α. However, few small-molecule inhibitors of FIH-1 have been developed. In this study, we synthesized
dichroism (CD) spectroscopy studies showed that the near-planar macrocycle could produce a CD response when combined with three of the twelve L-α-amino acid esters (all cryptochiral molecules) tested as possible guests. The host–guest complexation between the macrocycle and cationic guests was explored using NMR, revealing the presence of a strong affinity involving the multi-point recognition of guests
发现氢键(H键)酰胺大环可作为超分子手性转移过程的主客体组装中的有效成分。圆二色性 (CD) 光谱研究表明,当与十二个 L- α 中的三个结合时,近平面大环可以产生 CD 响应-氨基酸酯(所有隐手性分子)作为可能的客体进行测试。使用 NMR 探索了大环和阳离子客体之间的主客体络合,揭示了涉及客体多点识别的强亲和力的存在。密度泛函理论 (DFT) 计算进一步证实了这一点。目前的工作提出了一种通过基于氢键的大环主客体关联放大隐手性分子 CD 信号的新策略,有望用于设计超分子手性光学传感材料。
ORALLY BIOAVAILABLE D-GAMMA-GLUTAMYL-D-TRYPTOPHAN
申请人:TAM Tim Fat
公开号:US20120157387A1
公开(公告)日:2012-06-21
Provided are compounds which are prodrugs of D-gamma-glutamyl-D-tryptophan, methods of making the compounds and methods for using the compounds.