Figure 3.
(a) OAT from 2 by thiols forming 1 and sulfenic acids; trapping of sulfenic acid by dimedone forming the RS-dimedone adduct; (b) OAT from 2-THF by Ph3CSH forming 1-THF; (c) changes in the UV–vis spectra of 2-THF (4 mM in THF at −60 °C) upon adding 1 equiv of Ph3CSH. Inset: overlay of normalized UV–vis spectra of 1-THF and 2-THF at 22 °C in THF.