The efficient, highly selective photocycloaddition of 2, 3-dihydropyran to benzene

✍ Scribed by Andrew Gilbert; Grahame Taylor

• Publisher: Elsevier Science
• Year: 1977
• Tongue: French
• Weight: 202 KB
• Volume: 18
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(01)92668-1

✦ Synopsis

The 254 nm irradiation of benzene in the presence of ethylenes which have ionisation potentials less than ca. 9.1 e7 yields either exo and endo 1,3-cycloadducts

(1) or a mixture of 1,2-( ) and ---