Modification of Guanine with PhotolabileN-Hydroxypyridine-2(1H)-thione: Monomer Synthesis, Oligonucleotide Elaboration, and Photochemical Studies
作者:Despoina Vrantza、Panagiotis Kaloudis、Leondios Leondiadis、Thanasis Gimisis、Georgios C. Vougioukalakis、Michael Orfanopoulos、Didier Gasparutto、Jean Cadet、Susana Encinas、Cecilia Paris、Miguel A. Miranda
DOI:10.1002/hlca.200690220
日期:2006.10
N-hydroxypyridine-2(1H)-thione (NHPT), inserted as a photolabile modifier at the 6-position of 2′-deoxyguanosine or guanosine, has been evaluated. In particular, 6-[(1-oxidopyridin-2-yl)sulfanyl]- (1a) and 6-[(pyridin-2-yl)sulfanyl]-2′,6-dideoxyguanosine (2a), novel photolabile derivatives of the natural nucleosides, were synthesized and characterized. The observed photolysis products of 1a in organic solvents
已经评估了N-羟基吡啶-2(1 H)-硫酮(NHPT)的光化学性质,该化合物作为光不稳定的改性剂插入2'-脱氧鸟苷或鸟苷的6-位。特别是6-[((1-氧化吡啶-2-基)硫烷基]-(1a)和6-[(吡啶-2-基)硫烷基] -2′,6-二脱氧鸟苷(2a),它们的新的光不稳定衍生物。合成并表征了天然核苷。观察到的1a在有机溶剂中的光解产物只能通过假设与相应的6-[(2-硫氧吡啶吡啶-1(2 H)-基)氧基]类似物3a快速平衡来合理化(方案5)。1a的瞬态光谱表示适用于三重态三重态能量转移或单重态氧产生的强三重态激发态。NHPT功能足够稳定,可以用于(稍加修饰的)自动化固相寡核苷酸合成。讨论了上述化合物的用途,以及它们在DNA中活性氧物种的光敏化中的潜在用途。