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Pyrimidine 5-boronic acid could be used in an analogous one-pot copper-catalyzed DBAD coupling and condensation. The widely utilized Suzuki-Miyaura coupling allows for the coupling of boronic acids with carbon halides and surrogates.
Ramsay E. Beveridge,; Dilinie Fernando,; Brian S. Gerstenberger. One-pot copper-catalyzed synthesis of N-functionalized pyrazoles from boronic acids. Tetrahedron Letters. 2010, 51 (58), 5005-5008.
Gefahrenhinweise (EU): H301-H315-H319-H335
Toxic if swallowed. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves and eye/face protection. IF SWALLOWED: Immediately call a POISON CENTER/doctor IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.