The cobalt(III)-catalyzed allylation was developed for amide-directed C-H activation of arenes, heteroarenes, and olefins. A variety of allyl sources can be employed to introduce this useful functional group.
Direct allylation of aromatic and α,β-unsaturated carboxamides under ruthenium catalysis
作者:Mirim Kim、Satyasheel Sharma、Neeraj Kumar Mishra、Sangil Han、Jihye Park、Minyoung Kim、Youngmi Shin、Jong Hwan Kwak、Sang Hoon Han、In Su Kim
DOI:10.1039/c4cc03354j
日期:——
The ruthenium-catalyzed oxidative allylation of aromatic and alpha,beta-unsaturated carboxamides with allylic carbonates is described. These transformations proceed readily with complete linear gamma-selectivity of substituted allylic carbonates.
A visible-light metal-free photocatalytic synthesis of 3-position substituted 3,4-dihydroisoquinolin-1(2H)-one derivatives under mild conditions in moderate to good yields is described. EosinY Na, an organic dye, which is of low cost and has good availability, is used as the photocatalyst. A wide range of substrates are tolerated and the gram-scale reaction can also proceed smoothly. Mechanistic studies
An iron salt and a bipyridine‐type ligand catalyze the ortho‐allylation of 1‐arylpyrazoles and congeners with allyl phenyl ether under mild conditions (0 °C). The ligand, an organozinc base, and the nature of the allylating reagent are crucial for the success of this reaction. Under these conditions, a competitive phenylation reaction is largely retarded, and cross‐coupling of the organozinc with the
Directed C−H Allylation of Aromatic Carboxamides with Allyl Aryl Ethers under Cp*Co(III)‐Catalysis
作者:Asier Carral‐Menoyo、Iratxe Barbolla、Carlos Santiago、Martín Espinel、Nuria Sotomayor、Enrique Gómez‐Bengoa、Esther Lete
DOI:10.1002/ejoc.202301090
日期:2024.1.2
Allylarylethers have proved to be efficient allylating agents for (hetero)arenes under Cp*Co(III) catalysis using an amide as directing group. DFT calculations have shed light on the mechanistic course and reactivity pattern.