Facile N-arylation of amidines and N,N-disubstituted amidines
作者:Tuanli Yao
DOI:10.1016/j.tetlet.2015.06.017
日期:2015.7
A metal-free method for the N-arylation of amidines and N,N-disubstituted amidines using o-silylaryl triflate under very mild reaction conditions is developed. The reactions are compatible with a variety of functional groups. Imines can also be N-arylated by this method. Preparation of substituted phenanthridines via a Pd catalyzed intramolecular cyclization of the iodine containing N-arylation product
Direct Imidation to Construct 1<i>H</i>-Benzo[<i>d</i>]imidazole through Pd<sup>II</sup>-Catalyzed CH Activation Promoted by Thiourea
作者:Qing Xiao、Wen-Hua Wang、Gang Liu、Fan-Ke Meng、Jia-Hua Chen、Zhen Yang、Zhang-Jie Shi
DOI:10.1002/chem.200900154
日期:2009.7.27
method to construct 1H‐benzo[d]imidazole was developed by means of PdII‐catalyzed intramolecular CHactivation starting from easily available N‐phenylbenzimidamide (see scheme). The detailed mechanism studies indicated that a palladacycle monomer or dimer is the key intermediate for this transformation and thiourea was used for the first time to promote the efficiency of CHactivation.
通过Pd II催化的分子内CH活化作用,从容易获得的N -苯基苯甲酰胺开始(见方案),开发了一种新的直接构建1 H苯并[ d ]咪唑的方法。详细的机理研究表明,palladacycle单体或二聚体是该转化的关键中间体,硫脲首次用于提高CH活化效率。
Genetic diversity in Taro (Colocasia esculenta Schott, Araceae) in China: An ethnobotanical and genetic approach
作者:Xu Jianchu、Yang Yongping、Pu Yingdong、W. G. Ayad、P. B. Eyzaguirre