The polymerisation inhibitor, 2-nitrophenol reacts with radicals generated in self-initiated thermal styrene polymerisation to form the unexpected benzoxazine 1. We propose the mechanism for the formation of 1 and show that it is produced by a radical mediated C–H activation.
R. J. Thatcher, T. E. Newby, P. Price, C. Loyns and V. Chechik, RSC Adv., 2014, 4, 35131 DOI: 10.1039/C4RA05443A
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