azaheterocycle N-oxides with alkenes catalyzed by iodine under metal- and external oxidant-free reaction conditions has been developed. A variety of (E)-2-styrylazaheterocycles have been produced in moderate to excellent yields. The mechanistic exploration indicated that the N-oxide group played dual roles as both the directing group and an internal oxidant in this catalytic cycle.
The present invention generally relates to various compounds that are useful as α-synuclein ligands. The invention further relates to methods of using these compounds and their radiolabeled analogs for the detection of synucleinopathies, including Parkinson's disease (PD).
aldehydes has been achieved through a novel synergistic organocatalysis. The HOAc‐ activated 2‐methylquiolines undergo a Michael addition to 1,3‐dimethylbarbituricacid‐activated aldehydes, followed by a retro‐Michael addition to release 1,3‐dimethylbarbituricacid and the target products. The transformation produced various 2‐alkenylquinolines with good to excellent yields and featured mild reaction conditions
Lanthanum Pentafluorobenzoate-Catalyzed Aerobic Oxidative Olefination of Benzylamines with 2-Methylquinoline through Deamination and C–H Bond Functionalization
作者:Shengying Wu、Limin Wang、Dan Mao、Xiaoyan Zhu、Gang Hong
DOI:10.1055/s-0035-1562477
日期:——
An efficient direct aerobic oxidative olefination of the methyl groups of 2-methylquinolines with benzylamines in the presence of a rare-earth-metal Lewis acid catalyst to give 2-styrylquinolines was successfully developed. Preliminary mechanistic studies revealed that the oxidative olefination reaction proceeds through a Lewis acid-catalyzed 2-methylquinoline–aldehyde condensation and an amine–aldehyde
A catalyst-free dehydrative coupling of 2-methylazaarenes with aldehydes ‘on water’ has been developed for efficient synthesis of (E)-2-alkenylazaarenes. The challenging addition/dehydration of aliphatic aldehyde was successfully implemented using water as a solvent. A variety of 2-methylazaarenes, aromatic and aliphatic aldehydes were well tolerated.