An “On-Cycle” Precatalyst Enables Room-Temperature Polyfluoroarylation Using Sensitive Boronic Acids
作者:Liye Chen、Haydn Francis、Brad P. Carrow
DOI:10.1021/acscatal.8b00341
日期:2018.4.6
fluorinated arylboronic acid building blocks in cross-coupling has remained challenging, because of their acute base sensitivity. We report a general solution to this problem using a true catalytic intermediate, Pd(PAd3)(p-FC6H4)Br, as a uniquely effective “on-cycle” precatalyst that allows Suzuki–Miyaura coupling to occur much faster than even the most severe protodeboronation side reactions. Control of boron
交叉偶联中使用氟化芳基硼酸结构单元仍然具有挑战性,因为它们具有敏锐的碱敏感性。我们报告了使用真正的催化中间体Pd(PAd 3)(p -FC 6 H 4)Br作为唯一有效的“循环”预催化剂,可以使Suzuki-Miyaura偶联发生的速度快得多的一般解决方案。即使是最严重的原去硼副反应。还发现控制活性酸形式和休眠酯形式之间的硼形态在平衡催化速率与试剂分解之间起着至关重要的作用。该方法与任何氟化模式,对碱不稳定的官能团以及一系列溴(杂)芳烃均兼容。
Palladium-Catalyzed Asymmetric Conjugate Addition of Arylboronic Acids to Heterocyclic Acceptors
作者:Jeffrey C. Holder、Alexander N. Marziale、Michele Gatti、Bin Mao、Brian M. Stoltz
DOI:10.1002/chem.201203643
日期:2013.1.2
Flava Flavanone: Asymmetricconjugateadditions to chromones and 4‐quinolones are reported utilizing a single catalyst system formed in situ from Pd(OCOCF3)2 and (S)‐tBuPyOX. Notably, these reactions are performed in wet solvent under ambient atmosphere, and employ readily available arylboronicacids as the nucleophile, thus providing ready access to these asymmetric heterocycles (see scheme).
The present invention provides 2-pyrimidinyl pyrazolopyridine compounds, compositions containing the same, as well as processes for the preparation and their use as pharmaceutical agents.
The invention provides an RORγ receptor agonist comprising a compound of formula (I), wherein the variables are as defined herein. These compounds are analogous to known RORγ receptor antagonists. The invention further provides a method of activating -the nuclear receptor RORγ, comprising -contacting the RORγ with an effective amount or concentration of a compound of the invention; and a method of treating cancer in a patient, comprising administering to the patient an effective dose of a compound of the invention.
PARASITICIDAL COMPOSITIONS COMPRISING INDOLE DERIVATIVES, METHODS AND USES THEREOF
申请人:MERIAL, INC.
公开号:US20150366198A1
公开(公告)日:2015-12-24
The invention relates to oral, topical or injectable compositions for combating liver fluke parasites in mammals, comprising at least one indole derivative active agent. The invention also provides for an improved method for eradicating and controlling liver fluke parasite infections and infestations in a mammal comprising administering the compositions of the invention to the mammal in need thereof.