Establishing Amide···Amide Reliability and Synthon Transferability in the Supramolecular Assembly of Metal-Containing One-Dimensional Architectures
摘要:
On the basis of a combination of new structural data (eleven single-crystal structure determinations are presented) and information from the Cambridge Structural Database, it has been shown that self-complementary hydrogen-bond based amide center dot center dot center dot amide dimers can be relied upon as effective supramolecular synthons for the assembly and organization of acac- and paddle-wheel complexes of a variety of metal(II) ions. The targeted molecular recognition event and intended extended one-dimensional motif appear with a supramolecular yield of 78% (a total of 28 structures were examined). Despite the fact that the hydrogen bonds that give rise to the R-2(2)(8) motif can be disrupted by both carboxylate- and acac-ligands, as well as by solvent molecules, they remain remarkably resilient and therefore represent useful synthetic tools in inorganic crystal engineering.
A structure–Permeability study of small drug-like molecules
摘要:
A systematic structure permeability relationship study on a set of small drug-like molecules with log D values in the range -2.5 to 3 and carrying a diverse Arran of functionality reveals that the compounds with log D>0 and <3 are highly permeable. Surprisingly. several tetrazole derivatives were found to be substrates for efflux pump(s). (C) 2003 Elsevier Science Ltd. All rights reserved.
How robust is the hydrogen-bonded amide ‘ladder’ motif?
作者:Christer B. Aakeröy、Benjamin M. T. Scott、John Desper
DOI:10.1039/b715610c
日期:——
The well-known hydrogen-bonded ladder displayed by amides in the solidstate, is readily disrupted and reduced to an R22(8) motif if a competitive hydrogen-bond acceptor is incorporated in the molecularstructure of the amide. When a weaker hydrogen-bond acceptor (i.e. –NO2, –CN, –Cl, –Br) is present, the ladder persists in about every other case, whereas if a stronger hydrogen-bond acceptor is introduced
A structure–Permeability study of small drug-like molecules
作者:Thomas Fichert、Mehran Yazdanian、John R. Proudfoot
DOI:10.1016/s0960-894x(02)01035-1
日期:2003.2
A systematic structure permeability relationship study on a set of small drug-like molecules with log D values in the range -2.5 to 3 and carrying a diverse Arran of functionality reveals that the compounds with log D>0 and <3 are highly permeable. Surprisingly. several tetrazole derivatives were found to be substrates for efflux pump(s). (C) 2003 Elsevier Science Ltd. All rights reserved.
Establishing Amide···Amide Reliability and Synthon Transferability in the Supramolecular Assembly of Metal-Containing One-Dimensional Architectures
作者:Christer B. Aakeröy、Benjamin M. T. Scott、Michelle M. Smith、Joaquin F. Urbina、John Desper
DOI:10.1021/ic801992t
日期:2009.5.4
On the basis of a combination of new structural data (eleven single-crystal structure determinations are presented) and information from the Cambridge Structural Database, it has been shown that self-complementary hydrogen-bond based amide center dot center dot center dot amide dimers can be relied upon as effective supramolecular synthons for the assembly and organization of acac- and paddle-wheel complexes of a variety of metal(II) ions. The targeted molecular recognition event and intended extended one-dimensional motif appear with a supramolecular yield of 78% (a total of 28 structures were examined). Despite the fact that the hydrogen bonds that give rise to the R-2(2)(8) motif can be disrupted by both carboxylate- and acac-ligands, as well as by solvent molecules, they remain remarkably resilient and therefore represent useful synthetic tools in inorganic crystal engineering.