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首页> 外文期刊>RSC Advances >Synthesis of new Pro-PYE ligands as co-catalysts toward Pd-catalyzed Heck–Mizoroki cross coupling reactions
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Synthesis of new Pro-PYE ligands as co-catalysts toward Pd-catalyzed Heck–Mizoroki cross coupling reactions

机译：合成新的Pro-PYE配体作为Pd催化的Heck-Mizoroki交叉偶联反应的助催化剂

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摘要

The present research work describes the synthesis of five new ligands containing pyridinium amine, [H _(2) L ~(1) ][OTf] _(2) –[H _(2) L ~(5) ][I] _(2) from two new precursors, [P ~(3) _(Et) ][I] and [P ~(2) _(Me) ][CF _(3) SO _(3) ]. The structure elucidations of the compounds were confirmed by multinuclear NMR ( ~(1) H, ~(13) C), FT-IR and by single crystal XRD techniques. Theoretical DFT studies were carried out to get better insight into the electronic levels and structural features of all the molecules. These synthesized new Pro-PYE ligands [H _(2) L ~(1) ][OTf] _(2) –[H _(2) L ~(5) ][I] _(2) were found to be significantly active as co-catalysts for Pd(CH _(3) CO _(2) ) _(2) toward Heck–Mizoroki coupling reactions with wide substrate scope in the order of [H _(2) L ~(1) ][OTf] _(2) ? [H _(2) L ~(2) ][OTf] _(2) > [H _(2) L ~(3) ][OTf] _(2) > [H _(2) L ~(4) ][OTf] _(2) > [H _(2) L ~(5) ][I] _(2.) .
机译：目前的研究工作描述了五个新的含吡啶胺的配体的合成，[H _（2）L〜（1）] [OTf] _（2）– [H _（2）L〜（5）] [I] _（2）来自两个新的前体[P〜（3）_（Et）] [I]和[P〜（2）_（Me）] [CF _（3）SO _（3）]。通过多核NMR（〜（1）H，〜（13）C），FT-IR和单晶XRD技术证实了化合物的结构解析。进行了理论DFT研究，以更好地了解所有分子的电子能级和结构特征。发现这些合成的新的Pro-PYE配体[H _（2）L〜（1）] [OTf] _（2）– [H _（2）L〜（5）] [I] _（2）是作为Pd（CH _（3）CO _（2））_（2）的助催化剂，对Heck-Mizoroki偶联反应具有广泛的底物范围，以[H _（2）L〜（1）]的顺序具有显着活性[OTf] _（2）？ [H _（2）L〜（2）] [OTf] _（2）> [H _（2）L〜（3）] [OTf] _（2）> [H _（2）L〜（4 ）] [OTf] _（2）> [H _（2）L〜（5）] [I] _（2。）。

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