The invention provides a compound for use as an inhibitor of Hsp90, the compound having the formula (I): or salts, tautomers, solvates or N-oxides thereof; wherein: A is N or a group CR
3
; R
1
is a monocyclic or bicyclic carbocyclic or heterocyclic ring of 5 to 10 ring members of which up to two ring members may be heteroatoms selected from N, O and S and the remainder are carbon atoms, the carbocyclic or heterocyclic ring being optionally substituted by one or more substituent groups independently selected from R
10
; and R
2
, R
3
and R
10
are as defined in the claims.
Synthesis of New N-Arylpyrimidin-2-amine Derivatives Using a Palladium Catalyst
作者:Ibrahim El-Deeb、Jae Ryu、So Lee
DOI:10.3390/molecules13040818
日期:——
New N-aryl-4-(pyridin-3-yl)pyrimidin-2-amine derivatives were synthesizedfrom the corresponding amines, applying optimized Buchwald-Hartwig aminationconditions using dichlorobis(triphenylphosphine)Pd(II), xantphos and sodium tertbutoxidein refluxing toluene under a nitrogen atmosphere. The target N-aryl derivativeswere obtained in moderate to good yields ranging from 27% to 82%. The proceduredescribed could be widely employed for the preparation of new heterocyclic compounds.The structures of the new compounds were confirmed by FT-NMR, FT-IR and elementalanalysis.
Directed supramolecular assembly of Cu(<scp>ii</scp>)-based “paddlewheels” into infinite 1-D chains using structurally bifunctional ligands
作者:Christer B. Aakeröy、Nate Schultheiss、John Desper
DOI:10.1039/b513765a
日期:——
The construction of Cu(II)-containing supramolecular chains is achieved by combining suitable anionic ligands (for controlling the coordination geometry and for creating a neutral building block) with four new bifunctional ligands containing a metal-coordinating pyridyl site and a self-complementary hydrogen-bonding moiety. Seven crystal structures are presented and in each case, the copper(II) complex displays a âpaddlewheelâ arrangement, with four carboxylate ligands occupying the equatorial sites, leaving room for the bifunctional ligand to coordinate in the axial positions. The supramolecular chemistry, which organizes the coordination-complexes into the desired infinite 1-D chains, is driven by a combination of NâHâ¯N and NâHâ¯O hydrogen-bonds in five of the seven structures.
Directed Supramolecular Assembly of Infinite 1-D M(II)-Containing Chains (M = Cu, Co, Ni) Using Structurally Bifunctional Ligands
作者:Christer B. Aakeröy、Nate Schultheiss、John Desper
DOI:10.1021/ic048405y
日期:2005.7.1
The directed assembly of six different M(II) complexes (M = Cu, Co, and Ni) into infinite chains has been achieved by combining anionic chelating ligands (for controlling the coordination geometry) with bifunctional ligands containing a metal-coordinating pyridyl moiety and a self-complementary hydrogen-bonding moiety. Six crystal structures are presented, and in each case, the chelating acac ligand occupies the four equatorial coordination sites leaving room for the bifunctional ligand to coordinate in the axial positions. The supramolecular chemistry, which organizes the coordination complexes into the desired infinite 1-D chains, is driven by a combination of N-H center dot center dot center dot N and N-H center dot center dot center dot O hydrogen bonds.