作者:Yan-Guang Wang、Xu-Feng Lin、Jian Zhang、Sun-Liang Cui
DOI:10.1055/s-2003-40511
日期:——
The liquid-phase synthesis of oxadiazolines via 1,3-dipolar cycloaddition reaction on poly(ethylene glycol) support (PEG) is described. 1,3-Dipolar cycloadditions of nitrile oxide generated in situ on soluble polymer with a variety of imines provided a library of 1,2,4-oxadiazolines in good yields and purity. The reactions were run in the homogeneous phase and the synthetic sequences were performed in parallel one-pot fashion. Quantitative conversion in the 1,3-dipolar cycloaddition reaction was verified by 1H NMR analysis. The polymer bound products were isolated in excellent yields by simple precipitation of the soluble support.
描述了通过聚乙二醇载体 (PEG) 上的 1,3-偶极环加成反应液相合成恶二唑啉。在可溶性聚合物上原位产生的氧化腈与各种亚胺的 1,3-偶极环加成反应提供了具有良好产率和纯度的 1,2,4-恶二唑啉库。反应在均相中进行,合成序列以平行一锅法进行。 1,3-偶极环加成反应中的定量转化率通过 1 H NMR 分析进行验证。通过可溶性载体的简单沉淀,以优异的产率分离出聚合物结合的产物。