42459-68-7Relevant articles and documents
Tris(2-hydroxyethyl)ammonium 4-halo-2-methylphenoxyacetates (halocresacins)
Voronkov, M. G.,Belousova, L. I.,Grigor'Eva, O. Yu.,Vlasova, N. N.
, p. 1763 - 1766 (2015/02/02)
Convenient and efficient procedures have been developed for the synthesis of tris(2-hydroxyethyl)-ammonium 4-halo-2-methylphenoxyacetates (halocresacins). 4-Chloro-2-methylphenoxyacetic acid necessary for the preparation of chlorocresacin has been obtained by chlorination of 2-methylphenoxyacetic acid with sulfuryl chloride in the presence of aluminum powder. Bromocresacin has been synthesized by reaction of triethanolamine with 4-bromo-2-methylphenoxyacetic acid prepared by bromination of 2-methylphenoxyacetic acid with molecular bromine. Fluoro- and iodocresacins have been synthesized by exchange reaction of chlorocresacin with potassium fluoride and sodium iodide, respectively.