Reactive Organogels: Self-Assembled Support for Functional Materials
摘要:
[GRAPHICS]An organogel bearing reactive groups has been used as a platform for the gel-phase synthesis of more sophisticated materials. The results show that reactions take place on the gel fibers and that supramolecular aggregation modifies the product distribution in cases where several compounds can be obtained.
Efficient Macrocyclization of U-Turn Preorganized Peptidomimetics: The Role of Intramolecular H-Bond and Solvophobic Effects
作者:Jorge Becerril、Michael Bolte、M. Isabel Burguete、Francisco Galindo、Enrique García-España、Santiago V. Luis、Juan F. Miravet
DOI:10.1021/ja0284759
日期:2003.6.1
acetonitrile to very efficiently yield macrocyclic structures. The cyclization reaction does not require high dilution techniques and seems to be insensitive to the size of the formed macrocycle. The analysis of data obtained by (1)H NMR, single-crystal X-ray diffraction, fluorescence measurements, and molecular mechanics indicate that folded conformations can preorganize the system for an efficient cyclization
源自氨基酸的简单拟肽分子在乙腈中与间位和对位双(溴甲基)苯反应,非常有效地产生大环结构。环化反应不需要高稀释技术,并且似乎对形成的大环的大小不敏感。通过 (1)H NMR、单晶 X 射线衍射、荧光测量和分子力学获得的数据分析表明,折叠构象可以预先组织系统以实现有效的环化。分析了在折叠构象存在下分子内氢键和疏溶剂效应所起的作用。
New chiral tetraaza ligands for the efficient enantioselective addition of dialkylzinc to aromatic aldehydes
作者:M. Isabel Burguete、Jorge Escorihuela、Santiago V. Luis、Agustí Lledós、Gregori Ujaque
DOI:10.1016/j.tet.2008.07.099
日期:2008.10
enantioselective addition of dialkylzinc to aldehydes. These bis(amino amide) ligands show high enantioselectivity in the addition of organozincs to aromatic aldehydes. Different structural elements on the ligands seem to play an important role in determining the observed enantioselectivity. Ligand 4b (N,N′-bis(N-l-valinyl)-1,3-diaminopropane, with an aliphatic spacer with 3C atoms) catalyzed the addition of Et2Zn
作者:Jorge Becerril、M. Isabel Burguete、Beatriu Escuder、Francisco Galindo、Raquel Gavara、Juan F. Miravet、Santiago V. Luis、Gabriel Peris
DOI:10.1002/chem.200400031
日期:2004.8.20
The self-assembly of a series of smallpeptidomimeticcyclophanes in organic solvents was studied. X-ray diffraction, NMR spectroscopy, and molecular modelling were used to understand the structural features of these self-assembling compounds both at the molecular and supramolecular level. The factors that could influence the formation of gels rather than crystals were studied and a model for the arrangement
Minimalist peptidomimetic cyclophanes as strong organogelators
作者:Jorge Becerril、M. Isabel Burguete、Beatriu Escuder、Santiago V. Luis、Juan F. Miravet、Manel Querol
DOI:10.1039/b111229e
日期:2002.3.21
L-Valine containing cyclophanes have been shown to gelate organic solvents leading to soft materials with a clear expression of their chirality at the supramolecular level.
Pseudopeptidic macrocycles as cooperative minimalistic synzyme systems for the remarkable activation and conversion of CO<sub>2</sub> in the presence of the chloride anion
作者:Ferran Esteve、Belén Altava、M. Isabel Burguete、Michael Bolte、Eduardo García-Verdugo、Santiago V. Luis
DOI:10.1039/d0gc01449d
日期:——
A series of pseudopeptidic compounds have been assayed as organocatalyts for the conversion of CO2 into organic carbonates through a cooperative multifunctional mechanism. Conformationally constrained pseudopeptidicmacrocycles 3a and 3b have been revealed to be excellent synzymes for this purpose, being able to provide a suitable preorganization of the different functional elements and reaction components