Copper-Catalyzed, Directing Group-Assisted Fluorination of Arene and Heteroarene C–H Bonds
摘要:
We have developed a method for direct, copper-catalyzed, auxiliary-assisted fluorination of beta-sp(2) C-H bonds of benzoic acid derivatives and gamma-sp(2) C-H bonds of alpha,alpha-disubstituted benzylamine derivatives. The reaction employs a CuI catalyst, a AgF fluoride source, and DMF, pyridine, or DMPU solvent at moderately elevated temperatures. Selective mono- or difluorination can be achieved by simply changing reaction conditions. The method shows excellent functional group tolerance and provides a straightforward way for the preparation of ortho-fluorinated benzoic acids.
Copper‐Mediated Aminoquinoline‐Directed Radiofluorination of Aromatic C−H Bonds with K
<sup>18</sup>
F
作者:So Jeong Lee、Katarina J. Makaravage、Allen F. Brooks、Peter J. H. Scott、Melanie S. Sanford
DOI:10.1002/anie.201812701
日期:2019.3.4
A Cu-mediated ortho-C-H radiofluorination of aromatic carboxylicacids that are protected as 8-aminoquinoline benzamides is described. The method uses K18 F and is compatible with a wide range of functional groups. The reaction is showcased in the high specific activity automated synthesis of the RARβ2 agonist [18 F]AC261066.
Copper-Catalyzed, Directing Group-Assisted Fluorination of Arene and Heteroarene C–H Bonds
作者:Thanh Truong、Kristine Klimovica、Olafs Daugulis
DOI:10.1021/ja4047125
日期:2013.6.26
We have developed a method for direct, copper-catalyzed, auxiliary-assisted fluorination of beta-sp(2) C-H bonds of benzoic acid derivatives and gamma-sp(2) C-H bonds of alpha,alpha-disubstituted benzylamine derivatives. The reaction employs a CuI catalyst, a AgF fluoride source, and DMF, pyridine, or DMPU solvent at moderately elevated temperatures. Selective mono- or difluorination can be achieved by simply changing reaction conditions. The method shows excellent functional group tolerance and provides a straightforward way for the preparation of ortho-fluorinated benzoic acids.