Magnetically Retrievable Nano Crystalline Nickel Ferrite- Catalyzed Aerobic, Ligand-Free CN, CO and CC Cross- Coupling Reactions for the Synthesis of a Diversified Library of Heterocyclic Molecules
作者:Sanjay Paul、Koyel Pradhan、Sirshendu Ghosh、S. K. De、Asish R. Das
DOI:10.1002/adsc.201300686
日期:2014.4.14
A new nickel ferrite nano‐crystal‐catalyzed, ligand‐free strategy for the construction of CN, CO, and CC bonds is presented, in which easily available nitrogen and oxygen nucleophiles, aryl/heteroaryl halides and arylboronic acids are used for the cross‐couplingreactions. The reactions can be performed at low catalyst loadings with excellent functional group tolerance and chemoselectivity. A variety
Tautomerism of azine derivatives. 6. Tautomerism of 2-pyrimidinylmethane derivatives
作者:V. V. Lapachev、O. A. Zagulyaeva、O. P. Petrenko、S. F. Bychkov、V. P. Mamaev
DOI:10.1007/bf00508683
日期:1984.6
Synthesis of biologically potent new 3-(heteroaryl)aminocoumarin derivatives via Buchwald–Hartwig C–N coupling
作者:Asish R. Das、Arunima Medda、Raghunath Singha
DOI:10.1016/j.tetlet.2009.12.089
日期:2010.2
New 3-(heteroaryl)aminocoumarin derivatives were synthesized from 3-aminocoumarin, applying optimized Buchwald-Hartwig amination conditions using Palladium acetate, Cesium carbonate, and BINAP in 1,4-dioxane employing elevated temperature conditions and under an argon atmosphere. The target heteroarylaminocoumarin derivatives were obtained in moderate to good yields ranging from 56% to 98%. The procedure described Could be widely employed for the preparation of new heterocyclic compounds when one of the core moieties is coumarin and has the potential to be active drug candidates. (C) 2009 Elsevier Ltd. All rights reserved.
LAPACHEV, V. V.;ZAGULYAEVA, O. A.;PETRENKO, O. P.;BYCHKOV, S. F.;MAMAEV, +, XIMIYA GETEROTSIKL. SOEDIN., 1984, N 6, 827-831
作者:LAPACHEV, V. V.、ZAGULYAEVA, O. A.、PETRENKO, O. P.、BYCHKOV, S. F.、MAMAEV, +
DOI:——
日期:——
Substituent Effects on Exchange Coupling and Magnetic Relaxation in 2,2′-Bipyrimidine Radical-Bridged Dilanthanide Complexes
作者:Colin A. Gould、Edward Mu、Veacheslav Vieru、Lucy E. Darago、Khetpakorn Chakarawet、Miguel I. Gonzalez、Selvan Demir、Jeffrey R. Long
DOI:10.1021/jacs.0c10612
日期:2020.12.16
5'-R2bpym radical anion allows the magnetic exchange coupling constant, JGd-rad, for the gadolinium compounds in this series to be tuned over a range from -2.7 cm-1 (1) to -11.1 cm-1 (4), with electron-withdrawing or -donating substituents increasing or decreasing the strength of exchange coupling, respectively. Modulation of the exchange coupling interaction has a significant impact on the magnetic relaxation