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4-Iodopyrazole was used in an indium-mediated synthesis of heterobiaryls. It undergoes iodination in the presence of iodine and ammonium hydroxide to yield 3,4-di-iodo- and 3,4,5-tri-iodo-pyrazole.
Dmitrii N. Korolev.; Nikolay A. Bumagin. Pd-EDTA as an efficient catalyst for Suzuki-Miyaura reactions in water. Tetrahedron Lett. 2005, 46 (34),5751-5754.
Sandrine Guillou.; Yves L. Janin. 5-Iodo-3-Ethoxypyrazoles: An Entry Point to New Chemical Entities.Chemistry - A European Journal. 2010, 16 (15),4669-4677.
Hazard Statements: H301-H315-H319-H335
Toxic if swallowed. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Precautionary Statements: P261-P280a-P301+P310a-P305+P351+P338-P405-P501a
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.