The photochemical reactivity, in methanol at λ = 254 nm, of two 6α-hydroxy-7-keto neoclerodane, isoeriocephalin (1) and teucrolivin B (2) was evaluated. From the first compound, two new products were obtained: the 6β-hydroxy epimer (3) and the ɛ-lactone (4). The second one yielded exclusively the new spiro γ-lactone (5). The formation of these new products can be explained by the well-known radical mechanism Norrish type I.
Photochemical reactivity of 6α-hydroxy-7-keto neoclerodane diterpenoids / M. Bruno , S. Buscemi, S. Rosselli , L. Scaglioni. - In: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. A, CHEMISTRY. - ISSN 1010-6030. - 180:1-2(2006), pp. 54-58.
Photochemical reactivity of 6α-hydroxy-7-keto neoclerodane diterpenoids
L. ScaglioniUltimo
2006
Abstract
The photochemical reactivity, in methanol at λ = 254 nm, of two 6α-hydroxy-7-keto neoclerodane, isoeriocephalin (1) and teucrolivin B (2) was evaluated. From the first compound, two new products were obtained: the 6β-hydroxy epimer (3) and the ɛ-lactone (4). The second one yielded exclusively the new spiro γ-lactone (5). The formation of these new products can be explained by the well-known radical mechanism Norrish type I.
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