Photoinduced reactions. LXX. Photochemistry of 2-isoxazolines

✍ Scribed by Teruo Matsuura; Yoshikatsu Ito

• Publisher: Elsevier Science
• Year: 1973
• Tongue: French
• Weight: 227 KB
• Volume: 14
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(01)87617-6

✦ Synopsis

Most of photochemical valence tautomerization and fragmentation reactions of five-membered heteroaromatics of type$(c = 0, S or NR)2) can be interpreted by one of three tyoes of reactions occurring at the initial stage (Fig. 1), although other types of bond alternations have been considered in particular cases. 3) These three types of reactions may be formally regarded as [2 + 21 reactions. In this respect, photochemical reactions of corresponding dihydroheteroaromatics of typeL(c = 0, S or NR) can be classified into five categories (i)-(v) (Fig. 2). Among them, tyoe (i) reaction is known to occur with 4,5_dihydrofurans and 2-thiazolines, 4) type (iii) with 2-thiazolines and 1,2,3-triazolines 596) and type (iv) with 3,5-diohenyl-2isoxazoline.7) We now report that t.vpes (iii), (iv) and (v) of reactions occur with certain 2-isoxazolines.