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. Author manuscript; available in PMC: 2019 Jul 16.
Published in final edited form as: J Am Chem Soc. 2018 Dec 28;141(2):1062–1066. doi: 10.1021/jacs.8b11585

Figure 4.

Figure 4.

Mechanistic hypothesis for the reduction and inversion of the regioselectivity of H6H-catalyzed cyclization with respect to hydroxylation. This mechanism involves direct coordination of the substrate to the iron(IV)-oxo complex to facilitate dehydrogenation of the hydroxylated substrates (A) 2 and (B) 10.