Novel natural product-based cinnamates and their thio and thiono analogs as potent inhibitors of cell adhesion molecules on human endothelial cells
摘要:
In the present study, we report the design and synthesis of novel analogs of cinnamates, thiocinnamates and thionocinnamates and evaluated the potencies of these analogs to inhibit TNF-alpha induced ICAM-1 expression on human endothelial cells. By using whole cell-ELISA, our screening data demonstrated that ethyl 3',4',5'-trimethoxythionocinnamate (ETMTC) is the most potent inhibitor of TNF-alpha induced ICAM-1, VCAM-1 and E-selectin. As functional consequences, ETMTC abrogated TNF-alpha induced adhesion of neutrophils to the endothelial monolayer. Structure activity relationship studies revealed the critical role of the chain-length of the alkyl group in the alcohol moiety, number of methoxy groups in the aromatic ring of the cinnamoyl moiety and the presence of the alpha, beta- C-C double bond in the thiocinnamates and thionocinnamates. (C) 2011 Elsevier Masson SAS. All rights reserved.
Batch and Continuous-Flow One-Pot Processes using Amine Diazotization to Produce Silylated Diazo Reagents
作者:Clément Audubert、Oscar Javier Gamboa Marin、Hélène Lebel
DOI:10.1002/anie.201612235
日期:2017.5.22
A novel synthesis of trimethylsilyldiazomethane (TMSCHN2 ) by diazotization of trimethylsilylmethylamine (TMSCH2 NH2 ) is reported using batch and continuous flow synthesis. The latter affords a daily production of 275 g (2.4 mol) of TMSCHN2 . Other silylated methylamines were also successfully reacted under the developed reaction conditions to furnish various silicon-bearing diazomethane reagents
Novel natural product-based cinnamates and their thio and thiono analogs as potent inhibitors of cell adhesion molecules on human endothelial cells
作者:Sarvesh Kumar、Brajendra K. Singh、Pragya Arya、Shashwat Malhotra、Rajesh Thimmulappa、Ashok K. Prasad、Erik Van der Eycken、Carl E. Olsen、Anthony L. DePass、Shyam Biswal、Virinder S. Parmar、Balaram Ghosh
DOI:10.1016/j.ejmech.2011.09.008
日期:2011.11
In the present study, we report the design and synthesis of novel analogs of cinnamates, thiocinnamates and thionocinnamates and evaluated the potencies of these analogs to inhibit TNF-alpha induced ICAM-1 expression on human endothelial cells. By using whole cell-ELISA, our screening data demonstrated that ethyl 3',4',5'-trimethoxythionocinnamate (ETMTC) is the most potent inhibitor of TNF-alpha induced ICAM-1, VCAM-1 and E-selectin. As functional consequences, ETMTC abrogated TNF-alpha induced adhesion of neutrophils to the endothelial monolayer. Structure activity relationship studies revealed the critical role of the chain-length of the alkyl group in the alcohol moiety, number of methoxy groups in the aromatic ring of the cinnamoyl moiety and the presence of the alpha, beta- C-C double bond in the thiocinnamates and thionocinnamates. (C) 2011 Elsevier Masson SAS. All rights reserved.