A new stable spiropyranic aminyloxide (nitroxide)

✍ Scribed by Alexandru T. Balaban; Nicolae Negoita; Roman Baican

• Book ID: 102525460
• Publisher: John Wiley and Sons
• Year: 1977
• Tongue: English
• Weight: 154 KB
• Volume: 9
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1270090913

✦ Synopsis

Abstract

The N‐hydroxy‐spiropyran 1‐hydroxy‐3‐oxoindoline‐2‐spiro‐4′‐[2′,6′‐diphenyl‐4′ H‐pyran], prepared according to Van Allan et al. starting from a 4‐methyl substituted pyrylium salt, can be readily oxidized to the corresponding aminyloxide. This can be obtained in the crystalline state and may be kept as such for years without modification. The e.s.r. spectra were investigated in the solid and in solution.