Substituent Effect on the Chlorination of 2-Alkoxypyridines to give 2-Chloropyridines under Vilsmeier-Haack Conditions

…, PY Lin, JS Wang, JR Hwu, MJ Shiao…

Index: Lai, Long-Li; Lin, Pen-Yuan; Wang, Jy-Shih; Hwu, Jih Ru; Shiao, Min-Jen; Tsay, Shwu-Chen Journal of Chemical Research - Part S, 1996 , # 4 p. 194 - 195

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Citation Number: 5

Abstract

Abstract Various substituted 2-alkoxypyridines were converted into the corresponding 2- chloropyridines in 28-91% yields by use of POCl 3 and DMF, in which the methyl, halogen, ester and nitro groups displayed an activating effect; in contrast, an amino group exhibited a deactivating effect.