Construction of a Metallacyclopentadiene Ring through the Attack of Carbanions to M≡C Bond Followed by C—H Activation<sup>†</sup>
作者:Chun Tang、Shengjie Zhang、Zhengyu Lu、Qian Li、Ming Luo、Dafa Chen、Haiping Xia
DOI:10.1002/cjoc.202300476
日期:2024.2
intermediates in many reactions, therefore, new methods to achieve them are anticipated. In this study, a formal [3+2] method, through the reactions of an osmapentalyne with benzyl carbanions, was developed. The reactions underwent a nucleophilic attack of carbanions to the Os≡C bond, followed by C—H activation to form the five-membered osmacyclopentadiene ring. Most of the reactions were carried out at
金属环戊二烯是重要的金属环化合物,在许多反应中被视为中间体,因此,期望有新的方法来实现它们。在这项研究中,开发了一种正式的[3+2]方法,通过osmapentalyne与苄基碳负离子的反应。该反应经历了碳负离子对Os≡C键的亲核攻击,然后是CH活化形成五元环戊二烯环。大多数反应在室温下进行,苄基碳负离子芳环上的取代基多样,所得产物含有Os-H键,代表了一种新型的10C-碳龙配合物。该工作为构建金属环戊二烯提供了一条新的便捷途径,有望进一步推动该类物质的发展。