Darstellung und Charakterisierung von Trifluormethylchalkogenyl [(CF3E) E S, SO2, Se] substituierten Nucleosiden
作者:Alois Haas、Max Lieb、Bernd Steffens
DOI:10.1016/s0022-1139(00)80181-5
日期:1992.1
5-Trifluoromethylchalcogenyl-substituted 2′-desoxy-uridines and -cytidines have been synthesized from 2-desoxy-3,5-di-O-(4-methylbenzoyl)-α-D-ribofuranosyl chloride and CF3E- substituted (E S, SO2, Se) silylated pyrimidines by a modified Hilbert-Johnson reaction. By choosing proper reaction conditions β-anomers may be obtained as the main product. The nucleosides are deprotected by basic transesterification
由2-脱氧-3,5-二-O-(4-甲基苯甲酰基)-α-D-呋喃呋喃糖基氯和CF 3 E-取代的(E S,SO 2,Se)通过修饰的Hilbert-Johnson反应甲硅烷基化嘧啶。通过选择合适的反应条件,可以获得β-端基异构体作为主要产物。核苷通过用NH 3 / CH 3 OH进行的碱性酯交换作用脱保护。从H 2 O / C 2 H 5重结晶后OH,5-三氟甲基硫属酰基-2′-脱氧核苷以良好的产率形成。描述了在5-三氟甲基硫烷基-2'-脱氧尿苷上的系统研究取代反应。通过巴顿脱氧形成5-三氟甲基硫烷基-2',3'-二脱氧尿苷。首次描述了核苷糖部分的CF 3 S取代。