已经开发了一种用于制备烷基芳基醚的稳健实用的方案,该方案依赖于使用两种类型的配体来促进 Cu 催化的(杂)芳基卤化物的烷氧基化。反应范围非常适用于各种偶联伙伴,尤其是具有挑战性的仲醇和(杂)芳基氯。在与芳基氯化物和溴化物偶联的情况下,两个草酸二酰胺作为强大的配体。叔丁醇首先被证明是铜催化偶联反应的配体,导致芳基碘化物在室温下完成烷氧基化。此外,许多碳水化合物衍生物适用于该偶联反应,以 29-98% 的产率提供相应的碳水化合物-芳基醚。
Compounds of formula (I):
and pharmaceutically acceptable salts thereof, wherein one of R1 and R2 is H and the other is N═C(NH2)2 or NHC(═NH)NH2, and the other substituents are as defined herein, are urokinase (uPA) inhibitors.
Silver-Promoted Benzannulations of Siloxyalkynes with Pyridinium and Isoquinolinium Salts
作者:Jaime R. Cabrera-Pardo、David I. Chai、Sergey A. Kozmin
DOI:10.1002/adsc.201300443
日期:2013.9.16
efficient benzannulations of siloxyalkynes with pyridinium and isoquinolinium salts. Such reactions are successfully promoted by a stoichiometric amount of silver(I) benzolate under mild reaction conditions. This process proceeds via a formal inverse‐electron demand Diels–Alder reaction, followed by fragmentation of the initially produced bicyclic adducts to deliver a range of synthetically useful phenols
we describe the successful arylation of unactivated alkanes with heteroarenes by using iridium polypyridyl complexes as the photocatalyst and persulfate as the HAT catalyst precursor under visible-light irradiation. This reaction features good functional group tolerance and broad scope with regard to both alkane and heteroarene substrates (37 examples), which allows direct access to alkyl-substituted
CO Cross-Coupling of Activated Aryl and Heteroaryl Halides with Aliphatic Alcohols
作者:Peter E. Maligres、Jing Li、Shane W. Krska、John D. Schreier、Izzat T. Raheem
DOI:10.1002/anie.201203460
日期:2012.9.3
A robust and general catalyst system facilitates the alkoxylation of activatedheteroarylhalides with primary, secondary, and select tertiary alcohols without the need for an excess of either coupling partner (see scheme). This catalyst system displays broad functional‐group tolerance and excellent regioselectivity, and is insensitive to the order of reagent addition.
The synthesis and in vitro optimization of the anti-Helicobacterpyloriactivity of a novel series of benzyloxyisoquinoline derivatives discovered by a random screening process, are described. FR180102 (7f), having a 3-acetamido-2,6-dichlorobenzyl moiety, was found to have extremely potentactivityagainst H. pylori and no effect against a series of common Gram-positive and Gram-negative bacteria.