Synthesis and physicochemical characterization of fluorescent (<i>E</i>)-2-stilbenyloxyalkylthiouracils and isomer differentiation using EIMS
作者:Elzbieta Wyrzykiewicz、Monika Wendzonka
DOI:10.1002/jhet.5570410207
日期:2004.3
Twelve new fluorescent (E)-2-stilbenyloxyalkylthiouracils and 6-methyluracils 5a-51 were prepared. EI induced mass spectral fragmentation of these compounds was investigated. Fragmentation pathways are proposed on the basis of accurate mass and metastable transition measurements. Correlation between the intensities of the M+ and the selected fragment ions of these compounds is discussed. The data obtained
制备了十二个新的荧光(E)-2-苯乙烯基氧基烷基硫尿嘧啶和6-甲基尿嘧啶5a-51。EI诱导了这些化合物的质谱裂解。在精确的质量和亚稳态跃迁测量的基础上提出了断裂途径。讨论了M +强度与这些化合物的选定碎片离子之间的相关性。所获得的数据允许区分同质异构体。这些化合物的1 H和13 C NMR光谱使用异核(HETCOR)光谱和化学位移的组合明确分配。从这些光谱得到的数据可用于区分异构体。