3-β-d-erythrofuranosyl-1-phenylpyrazolo[3,4-b]quinoxaline, a new C-nucleoside analog
作者:Mohammed A.E. Sallam
DOI:10.1016/s0008-6215(00)83732-5
日期:1978.11
Abstract Dehydration of the hydroxyalkyl chain of 1-phenyl-3-( d - arabino -tetritol-1-yl)pyrazolo[3,4- b ]quinoxaline gave the C -nucleoside 3-β- d -erythrofuranosyl-1-phenyl-pyrazolo[3,4- b ]quinoxaline ( 2 ) in 82% yield. The structure, and the configuration at the anomeric carbon atom, of 2 were elucidated by periodate oxidation, c.d. and n.m.r. spectroscopy, and mass spectrometry. N.m.r.-spectral
摘要脱水了1-苯基-3-(d-阿拉伯糖-四糖醇-1-基)吡唑并[3,4-b]喹喔啉的羟烷基链,得到了C-核苷3-β-d-异呋喃呋喃糖基-1-苯基-吡唑并[3,4-b]喹喔啉(2),产率82%。通过高碘酸盐氧化,cd和nmr光谱以及质谱分析阐明了2的结构和在异头碳原子处的构型。Nmr光谱和cd研究表明,由于杂环碱基的尺寸较大,化合物2是通过侧链的构型或C-1的倒置形成的。讨论了具有脱水作用的脱水环化机理。