Identification of the First Selective Activin Receptor-Like Kinase 1 Inhibitor, a Reversible Version of L-783277
作者:Hanna Cho、Sandip Sengupta、Sean S. H. Jeon、Wooyoung Hur、Hwan Geun Choi、Hong-Seog Seo、Byung Joo Lee、Jeong Hun Kim、Minhwan Chung、Noo Li Jeon、Nam Doo Kim、Taebo Sim
DOI:10.1021/acs.jmedchem.6b01679
日期:2017.2.23
We synthesized 1 (San78-130), a reversible version of L-783277, as a selective and potent ALK1 inhibitor. Our study showed that 1 possesses great kinase selectivity against a panel of 342 kinases and more potent activity against ALK1 than L-783277. Among the six ALK isotypes (ALK1-6), ALK1 is most significantly inhibited by compound 1. Compound 1 suppresses the BMP9-induced Smad1/5 pathway by mainly inhibiting ALK1 in C2C12 cells. Our molecular dynamics simulations suggest that H-bonding interaction between the C-4' hydroxyl group of 1 and Arg334 of ALK1 substantially contributes to the ALK1 inhibition. To the best of our knowledge, 1 is the first selective ALK1 inhibitor. Furthermore, compound 1 promoted angiogenesis in both endothelial tube formation and microfluidic chip based 3D angiogenesis assays, suggesting that 1 could be a lead compound for therapeutic angiogenesis agents. Our study may provide an insight into designing selective and potent inhibitors against ALK1.
The protecting-group directed diastereoselective Nozaki–Hiyama–Kishi (NHK) reaction: total synthesis and biological evaluation of zeaenol, 7-epi-zeaenol and its analogues
作者:Debendra K. Mohapatra、D. Sai Reddy、N. Arjunreddy Mallampudi、Janardhan Gaddam、Sowjanya Polepalli、Nishant Jain、J. S. Yadav
DOI:10.1039/c4ob01811g
日期:——
The stereoselectivetotalsynthesis of zeaenol and 7-epi-zeaenol is achieved in a convergent manner using Julia-Kocienski olefination, protecting group-directed intermolecular diastereoselective Nozaki–Hiyama–Kishi (NHK) reaction, De Brabander's lactonization reaction and CBS reduction as the key steps. In this article, we have observed the most suitable protecting groups with respect to selectivity