Highly Efficient Monophosphine-Based Catalyst for the Palladium-Catalyzed Suzuki−Miyaura Reaction of Heteroaryl Halides and Heteroaryl Boronic Acids and Esters
作者:Kelvin Billingsley、Stephen L. Buchwald
DOI:10.1021/ja068577p
日期:2007.3.1
active and efficient catalyst system derived from a palladium precatalyst and monophosphine ligands 1 or 2 for the Suzuki-Miyaura cross-coupling reaction of heteroaryl boronic acids and esters has been developed. This method allows for the preparation of a wide variety of heterobiaryls in good to excellent yields and displays a high level of activity for the coupling of heteroaryl chlorides as well as
for a range of aryl halide and boronate coupling partners. Notably, aryl chlorides are viable coupling partners even under relatively mild conditions at short reaction times (e.g., 1 h at 60 °C). One of the best catalysts described here exhibits improved turnover frequency for a particularly difficult coupling reaction involving an aryl chloride and a sterically congested boronicester.
已经开发了一系列具有酰胺,尿素和氨基甲酸酯骨架的新型单连接芳基四环复合物,发现它们对Suzuki-Miyaura交叉偶联具有很高的活性。这些Palladacycle预催化剂衍生自简单,廉价的原料,并且对空气和湿气稳定。在测试的那些中最活跃的同类物是基于尿素的palladacycles,它与t Bu 3一起使用。P配体可诱导一系列芳基卤和硼酸酯偶联伙伴的高转化率。值得注意的是,即使在相对温和的条件下,较短的反应时间(例如,在60°C下1 h),芳基氯化物也是可行的偶合伴侣。这里描述的最好的催化剂之一对于特别困难的偶合反应表现出改善的周转频率,所述偶合反应涉及芳基氯和空间拥挤的硼酸酯。
Mild Cobalt-Catalyzed Negishi Cross-Couplings of (Hetero)arylzinc Reagents with (Hetero)aryl Halides
作者:Diana Haas、Jeffrey M. Hammann、Ferdinand H. Lutter、Paul Knochel
DOI:10.1002/anie.201510665
日期:2016.3.7
CoCl2⋅2 LiCl (5 mol %) and HCO2Na (50 mol %) enables the cross‐coupling of various N‐heterocyclic chlorides and bromides as well as aromatic halogenated ketones with various electron‐rich and ‐poor arylzincreagents. The reactions reached full conversion within a few hours at 25 °C.
[EN] INHIBITORS OF INFLUENZA VIRUS REPLICATION AND USES THEREOF<br/>[FR] INHIBITEURS DE RÉPLICATION DU VIRUS DE LA GRIPPE ET UTILISATIONS ASSOCIÉES
申请人:SUNSHINE LAKE PHARMA CO LTD
公开号:WO2018108125A1
公开(公告)日:2018-06-21
The invention provides a class of compounds as inhibitors of influenza virus replication, preparation methods thereof, pharmaceutical compositions containing these compounds, and uses of these compounds and pharmaceutical compositions thereof in the treatment of influenza.
Combining enabling techniques in organic synthesis: solid-phase-assisted catalysis under microwave conditions using a stable Pd(II)-precatalyst
作者:Kamal M. Dawood、Andreas Kirschning
DOI:10.1016/j.tet.2005.07.113
日期:2005.12
2-pyridinealdoxime-based Pd(II)-complex covalently anchored via the oxime moiety to a glass/polymer composite material was evaluated in Suzuki–Miyaura cross-coupling reactions of aryl and heteroaryl halides, including arylchlorides, with aryl and heteroaryl boronic acids both under thermal as well as microwaveirradiatingconditions in water. The stability and reusability of this Pd-precatalyst is part