HPOX was synthesized as previously reported [16]. In brief, 1,4-cyclohexanedimethanol
(21.96 mmol) and 4-hydroxybenzyl alcohol (5.49 mmol) were
dissolved in 20 mL of dry tetrahydrofuran (THF), under nitrogen, to which triethylamine
(60 mmol) was added dropwise at 4 C. Oxalyl chloride (27.45 mmol) in
25 mL of dry THF was added to the mixture dropwise at 4 C.