Phosphonylation of 2-Amino- and 2-Amido-3-bromopyridines and 2-Amino-3-chloroquinoxalines with Triethyl Phosphite
作者:M. Shaker S. Adam、Markus K. Kindermann、Martin Köckerling、Joachim W. Heinicke
DOI:10.1002/ejoc.200900698
日期:2009.9
the N atoms towards the reaction site. The advantage of the Tavs reaction is the easy optimization because neither auxiliary ligands are required nor a base to trap the halide or a solvent. Triethylphosphite itself acts as ligand and forms Pd0P(OEt)3}n in the initial phase of the reaction. The structures of the products and the expected intramolecular N–H···O=P hydrogen bridging bonds were proven
2-氨基-和2-酰氨基-3-溴吡啶1和2与亚磷酸三乙酯在乙酸钯或氯化物存在下的Tavs反应允许合成2-氨基-和2-酰氨基-3-膦酸酯3和4。第二个环氮原子引起强烈的活化,并导致 2-氨基-3-氯喹喔啉的膦酰化产生极好的收率。2,3-二氯喹喔啉不需要催化剂,在 Michaelis-Becker 条件下与二乙基亚磷酸钠发生双膦酰化反应。结果显示了吡啶氮 (-M) 的活化影响和氨基 (+M) 的失活影响。将Tavs偶联中1和2的反应性与3-NH-2-溴吡啶位置异构体和2-溴苯胺的反应性进行了比较,并从吡啶和氨基(酰氨基)氮的相反作用和不同位置的方面进行了讨论。 N 原子朝向反应位点。Tavs 反应的优点是易于优化,因为既不需要辅助配体,也不需要碱来捕获卤化物或溶剂。亚磷酸三乙酯本身作为配体并在反应的初始阶段形成 Pd0P(OEt)3}n。通过溶液核磁共振和单晶 3c 的 X 射线晶体结构分析证明了产物的结构和预期的分子内
[EN] PHOSPHADIAZINE HCV POLYMERASE INHIBITORS IV<br/>[FR] INHIBITEURS IV DE LA PHOSPHADIAZINE POLYMÉRASE VHC
申请人:IDENIX PHARMACEUTICALS INC
公开号:WO2009032180A1
公开(公告)日:2009-03-12
Provided herein are phosphadiazine polymerase inhibitor, for example, of any of Formulas (IV), (IV), (I'), (II'), or (IVa), pharmaceutical compositions comprising the compounds, and processes of preparation thereof. Also provided are methods of their use for the treatment of an HCV infection in a host in need thereof.
A general method for coupling aminopyridyl bromides with diethyl phosphite is reported. This efficient route is realized through the use of a palladium catalyst and triethylamine as base.