نتایج جستجو برای: hydrazones
تعداد نتایج: 1363 فیلتر نتایج به سال:
Thermodynamic control over kinetically-trapped mixtures of hydrazone-based macrocycles is achieved by addition of an aromatic monohydrazide to generate dynamic combinatorial libraries (DCLs) of linear and macrocyclic oligomers.
P. Souza* 3, M. A. Mendiola3, A. Arquerob, V. Fernández3, E. Gutiérrez-Pueblac, C. Ruiz-Valeroc a Departamento de Quimica (C -V III), Facultad de Ciencias, Universidad Autonoma de Madrid, Cantoblanco, 28049-Madrid, Spain b Departamento A.T.S.I., Facultad de Informätica, Universidad Politecnica de Madrid, M ontegancedo s/n, 28660-Boadilla del Monte, Madrid, Spain c Instituto de Ciencias de Mater...
Using a novel dynamic covalent approach relying on reversible hydrazone formation, a purely organic 3-dimensional prismatic cage was developed in water at elevated temperatures. By lowering the temperature, the hydrazone bond becomes kinetically inert. This self-assembled cage acts as an effective receptor for donor-acceptor pairs, whose interactions are weak in the absence of the cage.
New 1,2,3-thiadiazole and 1,2,3-selenadiazole derivatives, 14-23, were prepared from the ketones 1-5 via the corresponding semicarbazones or hydrazones 6-12. The Hurd-Mori and Lalezari methods were used, respectively, for the preparation of these 1,2,3-thiadiazole and 1,2,3-selenadiazole derivatives. The intermediate 13 was also trapped, separated and fully characterized. These derivatives are ...
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