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Relationship between Hammett constant and alkylation yield for VQ-SPhX precursors. (A) The reaction with G-4 in K+ buffer (n = 3, error bars indicate standard deviation). (B) Reaction in the presence of dipyridyl disulfide (n = 2). (C) The plausible vinyl generation mechanism of VQ-SPhX and thiol trap with dipyridyl disulfide.
