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6-Styryl-5-(het)arylfurazano[3,4-b]pyrazines have been obtained by novel C–H functionalization, which is a particular case of the nucleophilic substitution of hydrogen (S NH ). The process is initiated by the Michael addition of morpholine at the CC double bond of β-nitrostyrenes, and the subsequent addition of the generated carbanion to C-6 of 5-(het)arylfurazano[3,4-b]pyrazines, followed...
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