What is the role of tert-butyl nitrite (tBuONO) in the synthesis of porphyrin–azoheteroarene hybrids?

Label:chem

Topic
The synthesis of porphyrin–azoheteroarene hybrids involves a one-pot method using tert-butyl nitrite (tBuONO) as a key reagent.
Answer
Tert-butyl nitrite (tBuONO) acts as a nitroso donor in the synthesis of porphyrin–azoheteroarene hybrids. It reacts with the amino group of the porphyrin to form the azo linkage, facilitating the connection between the porphyrin core and the heteroarene moieties (pyrrole or indole).
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