Construction of a Metallacyclopentadiene Ring through the Attack of Carbanions to M≡C Bond Followed by C—H Activation  

作　　者：Chun Tang Shengjie Zhang Zhengyu Lu Qian Li Ming Luo Dafa Chen Haiping Xia 

机构地区：[1]State Key Laboratory of Physical Chemistry of Solid Surfaces,College of Chemistry and Chemical Engineering,Collaborative Innovation Center of Chemistry for Energy Materials,Xiamen University,Xiamen,Fujian,361005 China [2]Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis,Department of Chemistry,Southern University of Science and Technology,Shenzhen,Guangdong,518055 China

出　　处：《Chinese Journal of Chemistry》2024年第3期235-242,共8页中国化学（英文版）

基　　金：the NSFC(Nos.22071098,21931002 and 22101123);the Guangdong Provincial Key Laboratory of Catalysis(No.2020B121201002);the Shenzhen Science and Technology Innovation Committee(No.JCYJ20200109140812302);Introduction of Major Talent Projects in Guangdong Province(No.2019CX01C079);Outstanding Talents Training Fund in Shenzhen,for their financial support.

摘　　要：Metallacyclopentadienes are important metallacycles and regarded as 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 room temperature,the substituents on the aromatic rings of benzyl carbanions are diverse,and the resulting products contain an Os—H bond,representing a novel type of 10C-carbolong complexes.This work provides a new convenient route to construct metallacyclopentadienes,which is expected to further promote the development of such a type of substances.

关 键 词：Metallacyclopentadiene Carbolong chemistry OSMIUM C–H activation Nucleophilic addition 

分 类 号：O62[理学—有机化学]