Protodeboronation of (Hetero)Arylboronic Esters: Direct versus Prehydrolytic Pathways and Self-/Auto-Catalysis
作者:Hannah L. D. Hayes、Ran Wei、Michele Assante、Katherine J. Geogheghan、Na Jin、Simone Tomasi、Gary Noonan、Andrew G. Leach、Guy C. Lloyd-Jones
DOI:10.1021/jacs.1c06863
日期:2021.9.15
boronic esters under basic aqueous–organic conditions to be highly nuanced. In contrast to common assumption, esterification does not necessarily impart greater stability compared to the corresponding boronic acid. Moreover, hydrolysis of the ester to the boronic acid can be a dominant component of the overall protodeboronation process, augmented by self-, auto-, and oxidative (phenolic) catalysis when
一系列硼酸酯的碱催化水解(ArB(OR) 2 → ArB(OH) 2)和原脱硼化(ArB(OR) 2 → ArH)的动力学和机理,包括八种不同的多元醇和 10 种多氟芳基和杂芳基部分,已通过原位和停流 NMR 光谱(19 F、1 H 和11 B)、pH 速率依赖性、同位素夹带进行了研究,2H KIE 和 KS-DFT 计算。该研究揭示了硼酸酯在碱性水-有机条件下的现象稳定性非常微妙。与通常的假设相反,与相应的硼酸相比,酯化不一定赋予更高的稳定性。此外,酯水解为硼酸可以是整个原脱硼过程的主要成分,当 pH 值接近硼酸的 p K a时,自催化、自催化和氧化(酚类)催化作用增强酯。
Selective and Serial Suzuki–Miyaura Reactions of Polychlorinated Aromatics with Alkyl Pinacol Boronic Esters
作者:Sébastien Laulhé、J. Miles Blackburn、Jennifer L. Roizen
DOI:10.1021/acs.orglett.6b02323
日期:2016.9.2
availability and low toxicity of the required reagents, mild reaction conditions, and functional group compatibility. Nevertheless, few conditions can be used to cross-couple alkyl boronic acids or esters with aryl halides, especially 2-pyridyl halides. Herein, we describe two novel Suzuki–Miyaura protocols that enable selective conversion of polychlorinated aromatics, with a focus on reactions to convert
Nonsymmetrical Bis-Azine Biaryls from Chloroazines: A Strategy Using Phosphorus Ligand-Coupling
作者:Benjamin T. Boyle、Michael C. Hilton、Andrew McNally
DOI:10.1021/jacs.9b08504
日期:2019.9.25
in demand as these compounds have multiple applications in the chemical sciences and are challenging targets for metal-catalyzed cross-coupling reactions. Most approaches focus on developing new reagents as the formal nucleophilic coupling partner that can function in metal-catalyzed processes. We present an alternative approach using pyridine and diazine phosphines as nucleophilic partners and chloroazines
General Method for Synthesis of 2-Heterocyclic <i>N</i>-Methyliminodiacetic Acid Boronates
作者:Graham R. Dick、David M. Knapp、Eric P. Gillis、Martin D. Burke
DOI:10.1021/ol100671v
日期:2010.5.21
A wide range of 2-pyridyl and other difficult-to-access heterocyclic N-methyliminodiacetic acidboronates can be readily prepared from the corresponding bromides via a new method involving direct transligation of 2-heterocyclic trialkoxyborate salts with N-methyliminodiacetic acid (MIDA) at elevated temperatures.
[EN] NOVEL DIHYDROPYRIDOISOQUINOLINONES AND PHARMACEUTICAL COMPOSITIONS THEREOF FOR THE TREATMENT OF INFLAMMATORY DISORDERS<br/>[FR] NOUVELLES DIHYDROPYRIDOISOQUINOLINONES ET LEURS COMPOSITIONS PHARMACEUTIQUES POUR LE TRAITEMENT DE TROUBLES INFLAMMATOIRES
申请人:GALAPAGOS NV
公开号:WO2016169911A1
公开(公告)日:2016-10-27
A compound according to Formula (I): wherein R1, LA, CyA, RA, R2, R3, and R4 are as described herein. The present invention relates to novel compounds according to Formula I that antagonize GPR84, a G-protein-coupled receptor that is involved in inflammatory conditions, and methods for the production of these novel compounds, pharmaceutical compositions comprising these compounds, and methods for the prevention and/or treatment of inflammatory conditions, pain, neuroinflammatory conditions, neurodegenerative conditions, infectious diseases, autoimmune diseases, endocrine and/or metabolic diseases, cardiovascular diseases, leukemia, and/or diseases involving impairment of immune cell functions by administering a compound of the invention.