紫外光照射下4-羟基-4,9-二氢- 4h -杂原烯-4-酮的光降解

IF 1.7 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Russian Chemical Bulletin Pub Date : 2025-05-15 DOI:10.1007/s11172-025-4589-3

A. E. Tarakanova, K. A. Kozhanov, E. V. Baranov, M. V. Arsenyev, S. A. Chesnokov

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引用次数: 0

摘要

研究了一系列含有光敏α-羟基酮片段的4-羟基-4,9-二氢- 4h -杂原烯-4-酮在395 nm紫外光照射下的光降解。ESR法检测到所有化合物羟基苯氧基自由基的生成(aH(CAr−H)≈2.00-2.40 G, aH(But)≈0.30-0.35 G, aH（CH2Ar)≈0.75-0.85 G, aH(OH)≈0.4-0.5 G）。在紫外线照射下，羟基杂蒽酮发生光异构反应生成螺环己二烯酮。分别在1,3,5,7-四丁基-4 -羟基- 9h -口原烯-4(4aH)- 1和9,11-二叔丁基-7 -羟基- 12h -苯并[a]口原烯-8(7aH)- 1氯仿溶液中辐照（λ = 395 nm）后，定量分离出两个螺酮衍生物。

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Photodegradation of 4-hydroxy-4,9-dihydro-4H-xanthen-4-ones under UV irradiation

The photodegradation of a series of 4-hydroxy-4,9-dihydro-4H-xanthen-4-ones containing the photosensitive α-hydroxyketone fragment under UV irradiation (395 nm) was studied. The generation of hydroxyphenoxyl radicals (a_H(C_Ar−H) ≈ 2.00–2.40 G, a_H(Bu^t) ≈ 0.30–0.35 G, a_H(CH₂Ar) ≈ 0.75–0.85 G, a_H(OH) ≈ 0.4–0.5 G) was detected for all compounds by the ESR method. Under UV irradiation, hydroxyxanthenones undergo photoisomerization to form spirocyclohexadienones. Two derivatives of spiroketones were quantitatively isolated in the individual state after the irradiation (λ = 395 nm) of solutions of 1,3,5,7-tetrabutyl-4a-hydroxy-9H-xanthen-4(4aH)-one and 9,11-di-tert-butyl-7a-hydroxy-12H-benzo[a]xanthen-8(7aH)-one in chloroform.

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来源期刊

Russian Chemical Bulletin 化学-化学综合

CiteScore

2.70

自引率

47.10%

发文量

257

审稿时长

3-8 weeks

期刊介绍： Publishing nearly 500 original articles a year, by leading Scientists from Russia and throughout the world, Russian Chemical Bulletin is a prominent international journal. The coverage of the journal spans practically all areas of fundamental chemical research and is presented in five sections: General and Inorganic Chemistry; Physical Chemistry; Organic Chemistry; Organometallic Chemistry; Chemistry of Natural Compounds and Bioorganic Chemistry.