Zirconocene-Mediated Intermolecular Coupling of One Molecule of Si-Tethered Diyne with Three Molecules of Organonitriles: One-Pot Formation of Pyrrolo[3,2-<i>c</i>]pyridine Derivatives via Cleavage of C⋮N Triple Bonds of Organonitriles
作者:Xiaohua Sun、Congyang Wang、Zhiping Li、Shiwei Zhang、Zhenfeng Xi
DOI:10.1021/ja0497173
日期:2004.6.1
One Si-tethered diyne is coupled in one pot with three molecules of organonitriles promoted by a low-valent zirconocene species. Cleavage of one of the three CN triple bonds and cleavage of the two Si-C bonds take place to afford pyrrolo[3,2-c]pyridine derivatives after hydrolysis.
One-Pot Multicomponent Synthesis of Azaindoles and Pyrroles from One Molecule of a Silicon-Tethered Diyne and Three or Two Molecules of Organonitriles Mediated by Zirconocene
作者:Shaoguang Zhang、Xiaohua Sun、Wen-Xiong Zhang、Zhenfeng Xi
DOI:10.1002/chem.200902411
日期:2009.11.23
A zirconocene‐mediatedone‐pot multicomponentsynthesis process leading to the synthesis of pyrrolo[3,2‐c]pyridine (5‐azaindoles) and pyrrole derivatives has been developed starting from a silicon‐tethered diyne and three or two different or identical organonitriles. Pyrrolo[3,2‐c]pyridine and pyrrole derivatives with diverse structures and substitution patterns have been highly selectively prepared
锆茂茂介导的单锅多组分合成工艺从硅系二炔和三个或两个不同或相同的有机腈开始,导致合成吡咯并[3,2- c ]吡啶(5-氮杂吲哚)和吡咯衍生物。 。通过该方案高度选择性地制备了具有不同结构和取代方式的吡咯并[3,2- c ]吡啶和吡咯衍生物。各种各样的具有吸电子和供电子基团的脂肪族或芳香族有机腈和硅系二炔被用来以良好的优异分离产率提供5-氮杂吲哚和/或吡咯。在Cp 2 Zr II介导的一个(PhC≡C)反应中形成的关键中间体2 SiMe 2中,通过X射线单晶结构分析表征了i PrCN和一个p- tolylCN的两个分子,这使我们对反应过程有了很好的了解。