HETEROCYCLES

Heterocycles has a pay-per-view service for Non-subscribers.
You will be able to directly purchase the full text article through PayPal.
Your purchased Paper can be downloaded after the payment is completed.
An e-mail will be sent the URL to download the paper.
If you have any questions, please contact: purchase@heterocycles.com

Price: ¥ 4,400 (Yen only)
Period: This Article can be accessed for 7 days.

■ Heterocyclic Photorearrangements - Photochemical Behavior od Some 3-Acetylamino-5-aryl-1,2,4-oxadiazoles. A Photoinduced iso-Heterocyclic Rearrangement

Silvestre Buscemi, Gabriella Macaluso, and Nicolò Vivona*

*Dipartimento Chimica Organica, Università digli Studi di Palermo, Viale delle Scienze, 90128 Palermo, Italy

Abstract

The photochemical behaviour of some 3-acetylamino-5-aryl-1,2,4-oxadiazoles in methanol at 254 nm has been investigated. A photoinduced rearrangement to the corresponding 2-acetylaminoquinazolin-4-one derivatives has been pointed out and explained as proceeding through a preliminary iso-heterocyclic photoinduced rearrangement to the corresponding 3-aroylamino-5-methyl-1,2,4-oxadiazoles,followed by a subsequent photoreaction of the latter. Some mechanistic considerations are reported.