多环芳烃 (PAH),例如苯并 [ a ] 芘 (B a P),是普遍存在的环境污染物,与导致肺癌有关。B a P 是烟草烟雾的一种成分,通过酶促转化为与 DNA 相互作用的活性形式。我们之前报道了一种用于分析 B a P 代谢物的灵敏的稳定同位素稀释 LC/MS 方法的开发。我们现在报告了13 C 4 -B a P 的有效合成及其完整的13 C 4标记氧化代谢物,需要作为内标。它们包括不参与致癌作用的代谢物(A 组))和与癌症发生有关的代谢物(B组)。该合成方法是新颖的,需要使用 Pd 催化的 Suzuki、Sonogashira 和 Hartwig 交叉偶联反应与 PtCl 2催化的炔属化合物环化反应相结合。这种合成方法需要更少的步骤,使用更温和的条件,并且产物分离比传统的 PAH 合成方法更简单。13 C 4 -B a P 和13 C 4 -B a P-8-ol的合成各只需要四步,并且13
Phosphonium ionic liquids as reaction media for strong bases
作者:Taramatee Ramnial、Daisuke D. Ino、Jason A. C. Clyburne
DOI:10.1039/b411646a
日期:——
Phosphonium ionic liquids are compatible with strongbases; for example, solutions composed of commercially available phenylmagnesium bromide in THF are persistent in tetradecyl(trihexyl)phosphonium chloride for several hours-days: their stability appears to be couched in kinetic terms.
1-Aryl-3,3-dialkyltriazenes: A Convenient Synthesis from Dry Arenediazonium o-Benzenedisulfonimides - A High Yield Break Down to the Starting Dry Salts and Efficient Conversions to Aryl Iodides, Bromides and Chlorides
[EN] CYCLOALKYL SUBSTITUTED TRIAZOLE COMPOUNDS AS AGONISTS OF THE APJ RECEPTOR<br/>[FR] COMPOSÉS DE TRIAZOLE À SUBSTITUTION CYCLOALKYLE EN TANT QU'AGONISTES DU RÉCEPTEUR APJ
申请人:AMGEN INC
公开号:WO2018093577A1
公开(公告)日:2018-05-24
Compounds of Formula I and Formula II, pharmaceutically acceptable salt thereof, stereoisomers of any of the foregoing, or mixtures thereof are agonists of the APJ Receptor and may have use in treating cardiovascular and other conditions. Compounds of Formula I and Formula II have the following structures:(I) (II) where the definitions of the variables are provided herein.
Catalytic Palladium Phosphination: Modular Synthesis of C1-Symmetric Biaryl-Based Diphosphines
作者:Laurence Bonnafoux、Rafael Gramage-Doria、Françoise Colobert、Frédéric R. Leroux
DOI:10.1002/chem.201101529
日期:2011.9.19
derivative. So far, no synthetic pathway has been found to avoid this intramolecular reaction. Herein we report the first general and external‐ligand‐free palladium‐catalyzed phosphination reaction that allows the synthesis of a wide variety of substituted ortho,ortho′‐bis(diphenylphosphino)biphenyls. With the aim of illustrating the scope and efficiency of this methodology, we applied it to the establishment