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In combination with PPh3, can be used to convert alcohols and THP ethers to bromides with inversion of configuration. It is a versatile catalyst for acetalization and transacetalization of carbonyl compounds, preparation of acetonides from epoxides, and acylals from aldehydes. It is employed for selective monobromination of imidazoles and indoles
Akiko Saito, et al. An efficient method for converting alcohols to azides with 2,4,4,6-tetrabromo-2,5-cyclohexadienone/PPh3/Zn(N3)2·2Py.Tetrahedron Lett.,1997,38,(22), 3955-3958.
Habib Firouzabadi, et al. 2,4,4,6-Tetrabromo-2,5-cyclohexadienone (TABCO) as a Versatile, Efficient, and Chemoselective Catalyst for the Acetalization and Transacetalization of Carbonyl Compounds, the Preparation of Acetonides from Epoxides and Acylals (1,1-Diacetates) from Aldehydes.Bull. Chem. Soc. Jpn.,2002,75,(10), 2195-2205.
Selectively monobrominates phenols and unprotected arylamines mainly at the para position: J. Chem. Soc. (C), 3652 (1971). For tabulated results for the p-bromination of arylamines, see: Org. Synth. Coll., 6, 181 (1988).
ɑß-Unsaturated methyl ketones are brominated selectively at the methyl group: Tetrahedron, 29, 1625 (1973).
Reacts selectively with the terminal double bonds of polyenes: Chem. Lett., 283 (1976); Tetrahedron Lett., 26, 343 (1985). In aqueous systems, the products are the bromohydrins or, in methanol, their methyl ethers: Synthesis, 605 (1978) and references therein.
For selective monobromination of imidazoles and indoles, see: J. Chem. Soc., Perkin 1, 2567 (1972).
In combination with PPh3, can be used to convert alcohols and THP ethers to bromides with inversion of configuration: Tetrahedron Lett., 38, 1955 (1997). Silyl ethers also behave similarly: Tetrahedron Lett., 38, 7223 (1997).
Versatile catalyst for acetalization and transacetalization of carbonyl compounds, preparation of acetonides from epoxides, and acylals from aldehydes: Bull. Chem. Soc. Jpn., 75, 2195 (2002).
Dichiarazioni di rischio (UE): H315-H319-H335
Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Dichiarazioni precauzionali: P261-P280a-P305+P351+P338-P304+P340-P405-P501a
Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves and eye/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.