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Substrate scope for the pyridine dearomatization by amine borane and reaction‐condition‐based sensitivity screen.[a]
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[a] Standard reaction conditions: N‐heterocycle (0.5 mmol), triflic anhydride (1.2 equiv) or phenyl chloroformate (1.2 equiv) and trimethylamine borane (1.2 equiv) in MeCN (0.5 m) at −20 °C warming up to room temperature. Isomeric ratios were determined by GC–FID analysis. Isolated yields reported. See Supporting Information for more details.
