Photochemical Activities of<i>N</i>-Nitroso Carboxamides and Sulfoximides and Their Application to DNA Cleavage
作者:Jih Ru Hwu、Joseph Jen-Tse Huang、Fu-Yuan Tsai、Shwu-Chen Tsay、Ming-Hua Hsu、Kuo Chu Hwang、Jia-Cherng Horng、Ja-an Annie Ho、Chun-Cheng Lin
DOI:10.1002/chem.200802571
日期:2009.9.7
the absence of PTIO, it underwent decomposition followed by recombination to give the heterocyclic nitric oxide radical 15. Incorporation of intercalating moieties endowed the N‐nitroso compounds with DNA‐cleaving ability through single‐strand scission upon UV irradiation in a phosphate buffer (pH 5.0–8.0) under aerobic conditions.
合成了含有苯,芴或芴酮环的N-亚硝基化合物。这些化合物在312 nm的紫外线下光解提供NO 。物种,其存在通过使用EPR方法得到证实,并使用2-苯基-4,4,5,5-四甲基咪唑啉-1-氧基3-氧化物(PTIO)作为捕集剂。在不存在PTIO的情况下照射N-甲基-N-亚硝基-9-芴酮甲酰胺(14 c)时,它先分解后重组,得到杂环一氧化氮自由基15。插层部分的结合赋予了N在有氧条件下,在磷酸盐缓冲液(pH 5.0-8.0)中通过紫外线辐照可通过单链断裂而具有DNA裂解能力的亚硝基化合物。