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Total synthesis of Semibullvalene:
Reference: Paquette, L. A. J. Am. Chem. Soc. 1970, 92, 5765. DOI
Keywords: Electrocyclic-6π • Diels-Alder, Azo • Photochemistry 2+2 • Cyclobutane • N-C(O)NR2 → N-H • Hydrazine → Azo • Azo fragmentation •
Reagents: Hydroxide, potassium • O2

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