e.g. Filippa Pettersson or Cancer Res. 75(6) , 1102-12, (2015) or 10.1002/anie.201600521
Halogenation using quaternary ammonium polyhalides. IV. Selective bromination of phenols by use of tetraalkylammonium tribromides.
S Kajigaeshi, T Kakinami, T Okamoto…
Index: Kajigaeshi, Shoji; Kakinami, Takaaki; Okamoto, Tsuyoshi; Nakamura, Hiroko; Fujikawa, Masahiro Bulletin of the Chemical Society of Japan, 1987 , vol. 60, # 11 p. 4187 - 4189