Nucleotides, Part LXVII, The 2-Cyanoethyl and (2-Cyanoethoxy)carbonyl Group for Base Protection in Nucleoside and Nucleotide Chemistry
作者:Claudia Merk、Tilman Reiner、Evgeny Kvasyuk、Wolfgang Pfleiderer
DOI:10.1002/1522-2675(20001220)83:12<3198::aid-hlca3198>3.0.co;2-q
日期:2000.12.20
The amino functions of the common 2′-deoxyribo- and ribonucleosides were blocked by the (2-cyanoethoxy)carbonyl group on treatment with 2-cyanoethyl carbonochloridate (5) or 1-[(2-cyanoethoxy)carbonyl]-3-methyl-1H-imidazolium chloride (6) leading to 7, 18, 8, 19, 9, and 20. In 2′-deoxyguanosine, the amide group was additionally blocked at the O6 position by the 2-cyanoethyl (27) and 2-(4-nitrophenyl)ethyl
在用 2-氰基乙基碳氯酸酯 (5) 或 1-[(2-氰基乙氧基)羰基]-3-甲基-处理时,常见的 2'-脱氧核糖和核糖核苷的氨基官能团被 (2-氰基乙氧基)羰基封闭。 1H-咪唑氯化物 (6) 产生 7, 18, 8, 19, 9 和 20。在 2'-脱氧鸟苷中,酰胺基团在 O6 位被 2-氰乙基 (27) 和 2-( 4-硝基苯基)乙基(31, 32)。关于通过 β-消除裂解 ce/ceoc 和 npe/npeoc 基团的比较动力学研究揭示了有关核碱基不同位点的各种封闭基团的容易性和顺序脱保护的有价值的信息。