Nucleotides. Part LXXVIII
作者:Thomas Maier、Wolfgang Pfleiderer
DOI:10.1002/hlca.201000253
日期:2010.12
2′‐deoxyguanosine derivative 53 was transformed into 3′,5′‐di‐O‐acetyl‐2‐fluoro‐1‐2‐[(2,4‐dinitrophenyl)methylamino]ethyl}inosine (54; Scheme 5) which reacted with 2,2′‐[ethane‐1,2‐diylbis(oxy)]bis[ethanamine] to modify the 2‐position with an amino spacer resulting in 56 (Scheme 6). Attachment of the fluorescein moiety 55 at 56 via a urea linkage led to the doubly labeled 2′‐deoxyguanosine derivative 57 (Scheme 6)
几个Ñ(羟基烷基)-2,4-二硝基苯胺转化成它们的亚磷酰胺(参见5和6在方案1)鉴于它们作为荧光猝灭剂的使用,和改性的2-氨基苯甲酰胺(参见图9,10,18,和19在方案1中)在模型反应施加为荧光团,以确定3'-ABA的相对荧光量子产率和5'-DNP-3'-ABA共轭物(ABA =氨基苯甲酰胺,DNP =二硝基苯胺)。胸苷用N-(2-氯乙基)-2-,4-二硝基苯胺(24)烷基化,得到25,然后将其进一步修饰为结构单元27和28(方案3)。29中的2-氨基通过重氮化转化为2-氟肌苷衍生物30,用作在嘧啶核上进行数个反应的起始原料(→ 31、33和35;方案4)。3',5'-二-O-乙酰基-2'-脱氧-N 2 -[((二甲基氨基)亚甲基]鸟苷(37)被甲基和乙基碘化物优先在N(1)分别烷基化至43和44,并且类似地反应ñ - (2-氯乙基)-2,4-二硝基苯胺(24),以38和N-(2-碘乙基