Cobalt-Catalyzed Preparation of Arylindium Reagents from Aryl and Heteroaryl Bromides
作者:Laksmikanta Adak、Naohiko Yoshikai
DOI:10.1021/jo201174r
日期:2011.9.16
A cobalt–bathophenanthroline catalyst has been developed for the directpreparation of a variety of arylindium reagents from the corresponding aryl and heteroaryl bromides in the presence of indium metal and lithium chloride. The thus-formed arylindium reagents undergo efficient palladium-catalyzed cross-coupling reactions with aryl iodides, tolerating various functional groups including hydroxy and
Novel imidazolyl and triazolyl substituted biphenyl compounds: synthesis and evaluation as nonsteroidal inhibitors of human 17α-hydroxylase-C17, 20-Lyase (P450 17)
作者:Yan Zhuang、Bertil G. Wachall、Rolf W. Hartmann
DOI:10.1016/s0968-0896(00)00076-6
日期:2000.6
The synthesis of a new series of P45017inhibitors is described. The imidazol-1-yl compounds 5 showed strong inhibition of P45017 rat and especially human enzyme, the most active compounds being 5ax, 5ay and 5bx with IC50 values of 0.17, 0.24 and 0.25 microM, respectively (ketoconazole: 0.74 microM). The 1,2,4-triazol-1-yl compounds 6 were less active, while the 1,2,4-triazol-4-yl compounds 7 were
fluoroarylketone: tetrapyrazolyl dipalladium complexes with varying Pd–Pd distances efficiently catalyze the tandem reaction involving transferhydrogenation of fluoroarylketone to the corresponding alcohol and Suzuki–Miyaura cross-coupling reaction of the resulting fluoroarylalcohol under moderate reaction conditions, to biaryl alcohol. The complex with the shortest Pd–Pd distance exhibits the highest tandem
Tandem Suzuki–Miyaura/transfer hydrogenation reaction catalyzed by a Pd–Ru complex bearing an anionic dicarbene
作者:Mario J. Bitzer、Fritz E. Kühn、Walter Baratta
DOI:10.1016/j.jcat.2016.02.031
日期:2016.6
A hetero-bimetallic Pd–Ru N-Heterocyclic Dicarbene (NHDC) complex was synthesized from a Ag–Ru complex by transmetalation. The Pd–Ru system displays high catalytic activity in tandem Suzuki–Miyaura cross-coupling/transferhydrogenationreaction of bromoaryl ketones with boronic acids in toluene and 2-propanol in the presence of KOH.
A bis-heteroscorpionate Pd–Ru complex (1) is developed which shows efficient tandem Suzuki coupling/transfer hydrogenation reaction towards a broad range of substrates.