Formation of organopalladium complexes via C-Br and C-C bond activation. Application in C-C and C-N coupling reactions

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• 作者：Paramita Majumder ; Piyali Paul ; Poulami Sengupta ; Samaresh Bhattacharya ; ^{samaresh_b@hotmail.com}
• 关键词：C&ndash ; Br bond activation ; C&ndash ; C bond cleavage ; Organopalladium complex formation ; C&ndash ; C coupling reaction ; C&ndash ; N coupling reaction
• 刊名：Journal of Organometallic Chemistry
• 出版年：2013
• 出版时间：15 July, 2013
• 年：2013
• 卷：736
• 期：Complete
• 页码：1-8
• 全文大小：887 K

文摘

Reaction of [Pd₂(dba)₃] (dba?=?dibenzylideneacetone) with two Schiff base ligands (L¹ and L²), derived from the condensation of 8-aminoquinoline with 2-bromobenzaldehyde or 2-bromoacetophenone, in refluxing tert-butanol afforded two organopalladium complexes 1 and 2. Crystal structure of complex 1 has been determined by X-ray diffraction studies. Structure of complex 2 has been optimized by DFT method. In both the complexes the imine ligands are coordinated, via C-Br bond activation, as tridentate CNN-donor and the fourth coordination position is occupied by an acetylide ion provided by an outgoing dba ligand via C-C bond cleavage. Both the complexes display intense absorptions in the visible and ultraviolet regions. Both the complexes catalyze C-C and C-N coupling reactions efficiently.