Tuning Reactivity in Pd‐catalysed C(
<i>sp</i>
<sup>3</sup>
)‐H Arylations via Directing Group Modifications and Solvent Selection
作者:Charlotte E. Coomber、Michael J. Porter、Abil E. Aliev、Peter D. Smith、Tom D. Sheppard
DOI:10.1002/adsc.202000726
日期:2020.11.18
The palladium‐catalysed sp3 C−H arylation of a selection of saturated amine scaffolds was investigated using substituted picolinamide directing groups. On the bornylamine scaffold, highly selective monoarylation takes place using unsubstituted picolinamide or 3‐methylpicolinamide, whereas a double C−H arylation occurs with other substituents present, becoming a significant product with 3‐trifluoromethylpicolinamide
Silver-Free Palladium-Catalyzed C(sp<sup>3</sup>)–H Arylation of Saturated Bicyclic Amine Scaffolds
作者:Charlotte E. Coomber、Laure Benhamou、Dejan-Krešimir Bučar、Peter D. Smith、Michael J. Porter、Tom D. Sheppard
DOI:10.1021/acs.joc.7b02665
日期:2018.3.2
Herein, we report a silver-free Pd(II)-catalyzed C(sp3)–H arylation of saturated bicyclic and tricyclic amine scaffolds. The reaction provides good yields using a range of aryl iodides and aryl bromides including functionalized examples bearing aldehydes, ketones, esters, free phenols, and heterocycles. The methodology has been applied to medicinally relevant scaffolds. Two of the intermediate palladium