The spiro-linked crown formazans 7a,b and bis(crown formazan) 11 were synthesized by diazotization of tetrakis(amine) hydrochlorides 6, and 10, respectively, followed by coupling with malonic acid or cyanoacetic acid in pyridine.
CITATION STYLE
Abbas, A. A., & Elwahy, A. H. M. (2009). Synthesis of spiro-linked macrocyclic crown formazans and a bis(crown formazan). Arkivoc, 2009(10), 65–70. https://doi.org/10.3998/ark.5550190.0010.a07
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