Synthesis of tricyclic fused pyrrolidine nitroxides from 2-alkynylpyrrolidine-1-oxyls

• Mark M. Gulman,
• Yuliya F. Polienko,
• Sofia Yu. Trakhininа,
• Yuri V. Gatilov,
• Tatyana V. Rybalova,
• Sergey A. Dobrynin and
• Igor A. Kirilyuk

Beilstein J. Org. Chem. 2026, 22, 344–351, doi:10.3762/bjoc.22.22

• by ascorbate showed that the formation of the rigid tricyclic framework does not lead to a significant increase in stability of the radical center to chemical reduction. Keywords: annulated tricyclic system; nitroxide; pyrazole; pyrrolidine; triazole; Introduction Stable nitroxides are functional