and is tolerant of a broad range of functional groups. A wide scope of alkenyl carboxylic acids, including challenging conjugated polyene carboxylic acids, are amenable to this transformation and no addition of external oxidant is required. Mechanistic studies revealed that (1) Boc2O acts as the activator for the in situ transformation of the carboxylic acids into anhydrides before oxidative addition
A Rh-catalyzed chelation-assisted C6-selective C–Hactivation/alkylation of 2-pyridones with readily available alkyl carboxylic acids or anhydrides is introduced. The reaction proceeds via substrate decarbonylation. This approach merges C–H functionalization with readily available anhydrides, allowing for the efficient synthesis of various C6-alkylated 2-pyridones with good functional group tolerance
Novel construction of diversely functionalized N-heteroaryl-2-pyridones via copper(<scp>ii</scp>)-catalyzed [3+2+1] annulation
作者:Muhammad Saeed Akhtar、Jae-Jin Shim、Sung Hong Kim、Yong Rok Lee
DOI:10.1039/c7nj03013d
日期:——
A facile and novel one-pot construction of diversely functionalized N-heteroaryl-2-pyridones is achieved by Cu(OTf)2-catalyzed [3+2+1] annulation of various 2-aminopyridines and β-enamino esters. The [3+2+1] annulation proceeds via domino two Michael additions/elimination/isomerization/intramolecular cyclization.