Abstract
New access to substituted 2-(indol-3-yl)pyridines involves two stage protocol, namely, a reaction of deoxygenative nucleophilic substitution of hydrogen in 1,2,4-triazine-4-oxides under the action of indoles followed by aza-Diels–Alder reaction of thus obtained 5-indolyl-1,2,4-triazines with 2,5-norbornadiene in a pressure vessel. The reactions sequence provides good yields and is suitable for wide scope of substituted 1,2,4-triazines.
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