Scope and limitations of auxiliary-assisted, palladium-catalyzed arylation and alkylation of sp2 and sp3 C-H bonds.

Scope and limitations of auxiliary-assisted, palladium-catalyzed arylation and alkylation of sp2 and sp3 C-H bonds.
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DOI:
10.1021/jo4013628
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发表时间:
2013-10-04
期刊:
The Journal of organic chemistry
影响因子:
--
通讯作者:
Daugulis O
Daugulis O
中科院分区:
其他
文献类型:
--
作者:
Nadres ET;Santos GI;Shabashov D;Daugulis O

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本文研究了钯催化的、双芳基辅助的胺和羧酸衍生物的sp2和sp3 C-H键的直接芳基化和烷基化反应的范围。该方法使用乙酸钯催化剂、底物、芳基、烷基、苄基或烯丙基卤化物和无机碱在叔戊醇或水溶剂中在100-140 ℃下进行。芳基碘和烷基碘以及苄基溴和烯丙基溴在这种转化中是合适的试剂。吡啶甲酸助剂用于胺的γ-官能化,8-氨基喹啉助剂用于羧酸的β-官能化。为了达到最佳效果,需要对碱、添加剂和溶剂进行一些优化。
The scope of palladium-catalyzed, auxiliary-assisted direct arylation and alkylation of sp2 and sp3 C-H bonds of amine and carboxylic acid derivatives has been investigated. The method employs a palladium acetate catalyst, substrate, aryl, alkyl, benzyl, or allyl halide, and inorganic base in t-amyl alcohol or water solvent at 100-140 °C. Aryl and alkyl iodides as well as benzyl and allyl bromides are competent reagents in this transformation. Picolinic acid auxiliary is used for amine γ-functionalization and 8-aminoquinoline auxiliary is used for carboxylic acid β-functionalization. Some optimization of base, additives, and solvent is required for achieving best results.
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