N,N'-Bis(trimethylsilyl)dicyandiamide was prepared for the first time by the reaction of dicyandiamide with hexamethyldisilazane in boiling tetrahydrofuran. Thermal transformations of this compound were studied by DTA. The novel compound may be used in the synthesis of bis(trimethylsilyl) carbodiimide.
Synthesis of Pyrimidines and Triazines in Ice: Implications for the Prebiotic Chemistry of Nucleobases
作者:César Menor-Salván、Dra. Marta Ruiz-Bermejo、Marcelo I. Guzmán、Susana Osuna-Esteban、Sabino Veintemillas-Verdaguer
DOI:10.1002/chem.200802656
日期:2009.4.20
nucleobases: Freeze–thaw cycles in urea (1) solutions under methane/nitrogen atmospheres lead, with application of an energy source, to the synthesis of pyrimidines (mainly cytosine (2) and uracil (3)), triazines (such as cyanuric acid (4)), and adenine. This synthesis appears to be dependent on the atmosphere and the freezing conditions. At room temperature, hydantoin (5) is obtained. However, a freezing
Concise access to aluminum containing [3.3](2,6)pyridinophane and molecular bowl using 2,6-diamidopyridine modules
作者:Chandrakala Negi、Deependra Bawari、Sandeep Kumar Thakur、Angshuman Roy Choudhury、Sanjay Singh
DOI:10.1016/j.jorganchem.2019.120943
日期:2019.11
the relative stoichiometry of the building block bis(trimethylsilyl)–N,N′–2,6–diaminopyridine (bap) and EtAlCl2 or AlCl3, different molecular entities (mononuclear and dinuclear complexes, pyridinophane and molecular bowl) containing aluminum centres have been synthesized. Efforts to extend the approach to synthesize triazinophanes with bis(trimethylsilyl)-N,N′-2,4-diamino‒6‒(R)‒triazines (R = Me, NH(SiMe3)