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The reaction was run with 1 nmol of 23a. A 50 mM stock solution of the 5-hexenoic acid building block was prepared in ethanol. The percent conversions (% conv.) were determined by LC/MS after the quenching procedure, as described in the Supporting Information. Reaction conditions: green = main reaction conditions, blue = alternative #2, black = alternative #1, and red = Lu et al.
