Download PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Bromination of hydroxyheteroarenes using P 2 O 5 /Bu 4 NBr proceeds under mild conditions to afford high yields of various bromoheteroarenes. This procedure is successfully applied to large-scale syntheses of bromoheteroarenes. ... A mild bromination method of hydroxyheteroarenes using P 2 ...