Auxiliary-assisted palladium-catalyzed arylation and alkylation of sp2 and sp3 carbon-hydrogen bonds.
Auxiliary-assisted palladium-catalyzed arylation and alkylation of sp2 and sp3 carbon-hydrogen bonds.
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DOI:
10.1021/ja910900p
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发表时间:
2010-03-24
影响因子:
15
通讯作者:
Daugulis O
中科院分区:
文献类型:
--
作者:
Shabashov D;Daugulis O
We have developed a method for auxiliary-directed, palladium-catalyzed β-arylation and alkylation of sp3and sp2C−H bonds in carboxylic acid derivatives. The method employs a carboxylic acid 2-methylthioaniline- or 8-aminoquinoline amide substrate, aryl or alkyl iodide coupling partner, palladium acetate catalyst, and an inorganic base. By employing 2-methylthioaniline auxiliary, selective monoarylation of primary sp3C−H bonds can be achieved. If arylation of secondary sp3C−H bonds is desired, 8-aminoquinoline auxiliary may be used. For alkylation of sp3and sp2C−H bonds, 8-aminoquinoline auxiliary affords the best results. Some functional group tolerance is observed and amino- and hydroxy-acid derivatives can be functionalized. Preliminary mechanistic studies have been performed. A palladacycle intermediate has been isolated, characterized by X-ray crystallography, and its reactions have been studied.
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影响因子:
15
作者:
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通讯作者:
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