The photoinduced ring expansion of five membered ring nitrites: A 1,6-exo ring closure process of the intermediate 5-nitrosopentanoyl-type radical

✍ Scribed by Loris Grossi

• Publisher: Elsevier Science
• Year: 1997
• Tongue: French
• Weight: 381 KB
• Volume: 53
• Category: Article
• ISSN: 0040-4020
• DOI: 10.1016/s0040-4020(97)00031-8

✦ Synopsis

The direct photolysis of cyclopentyl-type nitrites allows to detection, by EPR spectroscopy, the corresponding &valerolactam-l-oxyl type radical, owing to a ring expansion process as reported for steroidal 17-nitrites. For the formation of these radicals a 1,6 exo ring closure process of the intermediate 5-nitrosopenlanoyl-type radical is involved.