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Regio- and Stereoselectivity of the [2 + 2] Photocycloaddition of Acyclic Enones to C 60

✍ Scribed by Vassilikogiannakis, Georgios; Orfanopoulos, Michael

Book ID: 121480062
Publisher: American Chemical Society
Year: 1999
Tongue: English
Weight: 45 KB
Volume: 64
Category: Article
ISSN: 0022-3263
DOI: 10.1021/jo982486w

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## Abstract Dihydrothiinone **9a** undergoes photocycloaddition regioselectively to all three CC bonds of penta‐1,2,4‐triene (**10**), the relative stabilities of the biradical intermediates determining the product distribution. In contrast, cyclohexenone **9b** and dihydropyranone **9c** afford m