Rhodium(<scp>i</scp>)-catalyzed Pauson–Khand-type reaction using formic acid as a CO surrogate: an alternative approach for indirect CO<sub>2</sub> utilization
作者:Xian-Dong Lang、Fei You、Xing He、Yi-Chen Yu、Liang-Nian He
DOI:10.1039/c8gc03933j
日期:——
(PK-type) reaction of various substituted 1,6-enynes to afford bicyclic cyclopentenones in moderate to good yields. High TON value of up to 263 and good results in the gram-scale experiment were also obtained, demonstrating the efficacy of this methodology. In addition, heterocyclic molecules of pharmaceutical importance were also furnished via inter- or intra-molecular hetero-PK-type reactions, further
已发现甲酸是各种取代的1,6-炔烃进行铑(I)催化的Pauson-Khand型(PK型)反应的理想CO替代物,以中等至良好的产率提供双环环戊烯酮。还获得了高达263的高TON值,并且在克级实验中也获得了良好的结果,证明了该方法的有效性。另外,还通过分子间或分子内的异PK型反应提供了具有药学重要性的杂环分子,从而进一步拓宽了当前策略的应用范围。在该协议中,甲酸是作为桥接分子用于将CO 2转化为CO,因为甲酸是通过CO 2的催化加氢制备的并在乙酸酐存在下容易释放出CO。因此,该方法代表了一种绿色,间接的方法,可用于制备增值化合物时对CO 2进行化学增值。