Abstract
Unexpected reduction of the nitro group to the amino one during aza-Diels–Alder reaction between (3-nitrophenyl)-1,2,4-triazines and 1-morpholinocyclopentene (neat, 200°C, argon) occurred to furnish 4-(3-aminophenyl)-6,7-dihydro-5H-cyclopenta[c]pyridines.
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