نتایج جستجو برای: diaminomaleonitrile

تعداد نتایج: 34  

Journal: :Angewandte Chemie 2021

The large amount of unstable species in the realm interstellar chemistry drives an urgent need to develop efficient methods for situ generations molecules that enable their spectroscopic characterizations. Such laboratory experiments are fundamental decode molecular universe by matching and terrestrial spectra. We propose approach based on laser ablation nonvolatile solid organic precursors. ge...

Journal: :European Journal of Organic Chemistry 2022

Abstract Amino acid decorated imidazole, pyrimidine and purine derivatives, resembling analogues of peptide nucleic acid's building blocks, have been synthesized by a three‐way multicomponent chemistry diaminomaleonitrile, one the most studied chemical precursors in prebiotic chemistry. The regioselectivity reaction between trimethyl orthoacetate selected panel α‐amino acids, was controlled ene...

Journal: :Research on Chemical Intermediates 2022

In this paper, calcium iodate nanoparticles were first synthesized by the modified reaction of Ca(NO3)2 and KIO3 in an aqueous medium under ultrasonic irradiation. The structure nanocatalyst was then characterized FT-IR, FESEM, EDX, XRD, BET techniques. Afterward, fabricated Ca(IO3)2 applied as a facile synthesis heterocycles including quinoxalines, 5,6-dicyano pyrazines, pyrido[2,3-b]pyrazines...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1962
R M Kliss C N Matthews

The hypothesis that life originated by a process of slow chemical evolution has been the basis of many attempts to synthesize biochemical molecules under simulated primitive earth conditions. Since the primitive atmosphere is believed to have been strongly reducing, consisting essentially of the hydrides of hydrogen, carbon, nitrogen, and oxygen,'-3 experiments have been directed toward the syn...

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