Preparation of Polyfunctional Naphthyridines by Cobalt-Catalyzed Cross-Couplings of Halogenated Naphthyridines with Magnesium and Zinc Organometallics.

Preparation of Polyfunctional Naphthyridines by Cobalt-Catalyzed Cross-Couplings of Halogenated Naphthyridines with Magnesium and Zinc Organometallics.
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DOI:
10.1021/acs.orglett.7b03242
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发表时间:
2017-12-01
期刊:
影响因子:
5.2
通讯作者:
Knochel P
Knochel P
中科院分区:
化学1区
文献类型:
--
作者:
Greiner R;Ziegler DS;Cibu D;Jakowetz AC;Auras F;Bein T;Knochel P

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CoCl 2(5%)催化各种卤代萘啶与烷基和芳基卤化镁的交叉偶联。在CoCl_2·2LiCl(5%)和甲酸钠(50%)存在下,芳基锌卤化物与各种萘啶发生了平滑的交叉偶联反应,生成了多官能芳基化萘啶。其中两种芳基化萘啶具有高荧光性,量子效率达到95%,激发态寿命长达12 ns。
CoCl2 (5%) catalyzes cross-couplings of various halogenated naphthyridines with alkyl- and arylmagnesium halides. Also, arylzinc halides undergo smooth cross-couplings with various naphthyridines in the presence of CoCl2·2LiCl (5%) and sodium formate (50%), leading to polyfunctional arylated naphthyridines. Two of these arylated naphthyridines are highly fluorescent, with quantum efficiencies reaching 95% and long excited-state lifetimes of up to 12 ns.
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