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3-Bromo-2-chloro-4-methoxypyridine has been developed as a practical 2,3-pyridyne precursor. The substituted 2,3-pyridyne generated from this precursor by halogen-metal exchange has been found to react regioselectively with 2-methoxyfuran and 2-methylfuran.
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Walters et al. (1992) studied this question.
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