Synthesis and Characterization of Pyrazine-2.
Synthesis of Pyrazole. CONTROLS. Click the structures and reaction arrows in sequence to view the 3D models and animations respectively. Reaction of a 1,3-diketone and hydrazine gives a five-membered heterocycle known as a pyrazole. The enamine and imine formed make the heterocycle aromatic without having to carry out an oxidation step. A. R. Katritzky, D. L. Ostercamp and T. I. Yousaf.
A novel solid-phase synthesis methodology of N-substituted-2-aminothiazolo(4,5-b)pyrazine derivatives was developed. The key step in this synthesis strategy is tandem reaction of isothiocyanate terminated resin 2 with o-halo-2-aminopyrazine, affording cyclized 2-aminothiazolo(4,5-b)pyrazine resin 4. To increase the diversity of our library, Suzuki coupling reaction was performed at the.
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