Ligand-accelerated ortho-C-H alkylation of arylcarboxylic acids using alkyl boron reagents.

Ligand-accelerated ortho-C-H alkylation of arylcarboxylic acids using alkyl boron reagents.
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DOI:
10.1021/ja409014v
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发表时间:
2013-11-20
影响因子:
15
通讯作者:
Yu JQ
Yu JQ
中科院分区:
化学1区
文献类型:
--
作者:
Thuy-Boun PS;Villa G;Dang D;Richardson P;Su S;Yu JQ

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公开了一种使用烷基硼试剂对苯乙酸和苯甲酸进行钯(II)催化的邻位C - H烷基化的方案。发现单保护氨基酸配体(MPAA)可显著提高反应活性。烷基三氟硼酸钾和烷基硼酸均为相容的偶联配偶体。还研究了自由基烷基转移至钯(II)的可能性。
A protocol for the Pd(II)-catalyzed ortho-C–H alkylation of phenylacetic and benzoic acids using alkylboron reagents is disclosed. Mono-protected amino acid ligands (MPAA) were found to significantly promote reactivity. Both potassium alkyltrifluoroborates and alkylboronic acids were compatible coupling partners. The possibility of a radical alkyl transfer to Pd(II) was also investigated.
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