Expedient Preparation of Aryllithium and Arylzinc Reagents from Aryl Chlorides Using Lithium 4,4′-Di-tert-Butylbiphenylide and Zinc(II) Chloride
作者:Paul Knochel、Zhi-Liang Shen、Korbinian Sommer
DOI:10.1055/s-0034-1380697
日期:——
aryllithium and zinc reagents from inexpensive and readily available arylchlorides by using lithium 4,4′-di-tert-butylbiphenylide (LiDBB) as a lithiation reagent. The resulting organometallic reagents underwent subsequent reactions with a variety of electrophiles, such as an aldehydes, DMF, PhSSO2Ph, TsCN, an aryl halide, or an acid chloride (through Pd-catalyzed cross-coupling). Arylchlorides bearing substituents
Palladium Membrane-Installed Microchannel Devices for Instantaneous Suzuki-Miyaura Cross-Coupling
作者:Yoichi M. A. Yamada、Toshihiro Watanabe、Tomohiko Beppu、Naoshi Fukuyama、Kaoru Torii、Yasuhiro Uozumi
DOI:10.1002/chem.201000511
日期:——
Instantaneous catalytic carbon–carbon bond‐forming reactions were achieved in catalytic membrane‐installed microchanneldevices that have a polymeric palladium‐complex membrane. The catalytic membrane‐installed microchanneldevices were provided inside the microchannels by means of coordinative and ionic molecular convolution at the interface between the organic and aqueous phases flowing laminarly
Structure-activity relationship studies for the development of inhibitors of murine adipose triglyceride lipase (ATGL)
作者:Nicole Mayer、Martina Schweiger、Elisabeth Fuchs、Anna K. Migglautsch、Carina Doler、Gernot F. Grabner、Matthias Romauch、Michaela-Christina Melcher、Rudolf Zechner、Robert Zimmermann、Rolf Breinbauer
DOI:10.1016/j.bmc.2020.115610
日期:2020.8
non-alcoholic fatty liver disease (NAFLD) generalized in the term metabolic syndrome. Adipose triglyceride lipase (ATGL) is the initial enzyme in the hydrolysis of intracellular triacylglycerol (TG) stores, liberating fatty acids that are released from adipocytes into the circulation. Hence, ATGL-specific inhibitors have the potential to lower circulating FA concentrations, and counteract the development of insulin
Unified Protocol for Fe-Based Catalyzed Biaryl Cross-Couplings between Various Aryl Electrophiles and Aryl Grignard Reagents
作者:Lei Wang、Yi-Ming Wei、Yan Zhao、Xin-Fang Duan
DOI:10.1021/acs.joc.9b00151
日期:2019.5.3
Ti(OEt)4/PhOM enabled a highly general iron-based catalyst system, which could efficiently catalyze the biaryl coupling reaction between various electrophiles (I, Br, Cl, OTs, OCONMe2, OSO2NMe2) and common or functionalized aryl Grignardreagents with high functional group tolerance. Selective couplings of aryl iodides and bromides over the corresponding oxygen-based electrophiles have been achieved, and
Preparation of Unsymmetrical Biaryls by Pd(II)-Catalyzed Cross-Coupling of Aryl Iodides
作者:Liqiang Wang、Wenjun Lu
DOI:10.1021/ol802865c
日期:2009.3.5
The Ullmann homo- and cross-couplings of aryliodides are carried out to afford symmetrical and unsymmetrical biaryls in moderate to good yields in a catalytic system of Pd(OAc)2/K2CO3/MeCOEt. The high selectivity of unsymmetrical biaryl products in cross-couplings mainly depends on the reactivity difference between two iodoarene substrates and their employed ratios.
在Pd(OAc)2 / K 2 CO 3 / MeCOEt催化体系中,进行芳基碘化物的乌尔曼均偶联和交叉偶联,以中等到良好的收率得到对称和不对称的联芳基。不对称联芳基产物在交叉偶联中的高选择性主要取决于两个碘芳烃底物之间的反应性差异以及它们的使用比例。