已经报道了一种合成1,5-和1,4,5-取代的1,2,3-三唑的新方法。使用烯胺和N-甲苯磺酰肼作为原料的碘-TBHP氧化系统促进了这种方法,避免了传统方法对叠氮化物和过渡金属的依赖。通过这种方法,各种1,5-和1,4,5-取代的1,2,3-三唑以中等到高产量提供。机理研究表明,氨基交换将参与反应过程。此外,产品1-(2-甲氧基苯基)-4-甲基-1 H -1,2,3-三唑-5-羧酸甲酯是抗甲型流感药物的有用前体,并进行了进一步的应用研究。
Alkyl Propiolates Participated [3+2] Annulation for the Switchable Synthesis of 1,5‐ and 1,4‐Disubstituted 1,2,3‐Triazoles Containing Ester Side Chain
作者:Shuo Cao、Yunyun Liu、Changfeng Hu、Chengping Wen、Jie‐Ping Wan
DOI:10.1002/cctc.201801366
日期:2018.11.7
By means of a featured enamine activation, the alkylpropiolates have been successfully employed in the [3+2] annulation for the synthesis of 1,2,3‐triazoles. The synthesis of both 1,4‐ as well as the hardly available 1,5‐disubstituted1,2,3‐triazoles can be selectively accessed by using tosyl azide and tosyl hydrazine as nitrogen source, respectively.
Provided herein are compounds of the formula (I): as well as pharmaceutically acceptable salts thereof, wherein the substituents are as those disclosed in the specification. These compounds, and the pharmaceutical compositions containing them, are useful for the treatment of inflammatory diseases and disorders such as, for example, pulmonary fibrosis.
Discovery of Highly Selective and Orally Active Lysophosphatidic Acid Receptor-1 Antagonists with Potent Activity on Human Lung Fibroblasts
作者:Yimin Qian、Matthew Hamilton、Achyutharao Sidduri、Stephen Gabriel、Yonglin Ren、Ruoqi Peng、Rama Kondru、Arjun Narayanan、Terry Truitt、Rachid Hamid、Yun Chen、Lin Zhang、Adrian J. Fretland、Ruben Alvarez Sanchez、Kung-Ching Chang、Matthew Lucas、Ryan C. Schoenfeld、Dramane Laine、Maria E. Fuentes、Christopher S. Stevenson、David C. Budd
DOI:10.1021/jm301022v
日期:2012.9.13
Lysophosphatidic acid is a class of bioactive phospholipid that mediates most of its biological effects through LPA receptors, of which six isoforms have been identified. The recent results from LPA1 knockout mice suggested that blocking LPA1 signaling could provide a potential novel approach for the treatment of idiopathic pulmonary fibrosis. Here, we report the design and synthesis of pyrazole- and triazole-derived carbamates as LPA1-selective and LPA1/3 dual antagonists. In particular, compound 2, the most selective LPA1 antagonist reported, inhibited proliferation and contraction of normal human lung fibroblasts (NHLF) following LPA stimulation. Oral dosing of compound 2 to mice resulted in a dose-dependent reduction of plasma histamine levels in a murine LPA challenge model. Furthermore, we applied our novel antagonists as chemistry probes and investigated the contribution of LPA1/2/3 in mediating the pro-fibrotic responses. Our results suggest LPA1 as the major receptor subtype mediating LPA-induced proliferation and contraction of NHLF.
LYSOPHOSPHATIDIC ACID RECEPTOR ANTAGONISTS
申请人:Buckman Brad O.
公开号:US20130072449A1
公开(公告)日:2013-03-21
Compounds, methods of making such compounds, pharmaceutical compositions and medicaments comprising such compounds, and methods of using such compounds to treat, prevent or diagnose diseases, disorders, or conditions associated with one or more of the lysophosphatidic acid receptors are provided.