The chemistry of benzotriazole. A novel and versatile synthesis of 1-alkyl-, 1-aryl-, 1-(alkylamino)-, or 1-amido-substituted and of 1,2,6-trisubstituted piperidines from glutaraldehyde and primary amines or monosubstituted hydrazines
Synthesis of β-Methylsulfonylated N-Heterocycles from Saturated Cyclic Amines with the Insertion of Sulfur Dioxide
作者:Yan He、Jintao Yang、Qimeng Liu、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.joc.0c02368
日期:2020.12.4
An efficient synthesis of β-methylsulfonylated N-heterocycles via FeCl3-catalyzed C(sp3)–H dehydrogenation and C(sp2)–H methylsulfonylation of inactivated cyclic amines with the promotion and participation of inorganic sodium metabisulfite and dicumyl peroxide (DCP) has been developed. Notably, bifunctional DCP acted not only as an oxidant to promote the dehydrogenation but also as a methyl radical
Synthesis and characterization of N-heterocyclic carbene-palladium(<scp>ii</scp>) chlorides-1-methylindazole and -1-methylpyrazole complexes and their catalytic activity toward C–N coupling of aryl chlorides
作者:Xiao-Yun Zhao、Quan Zhou、Jian-Mei Lu
DOI:10.1039/c6ra02556k
日期:——
series of N-heterocycliccarbene-palladium(II) chlorides-1-methylindazole and -1-methylpyrazole complexes was successfully synthesized and fully characterized by X-ray single crystal diffraction. In addition, initial investigations of their catalytic activity showed that they were efficientcatalysts in the C–N coupling of primary and secondary amines with aryl chlorides at low catalyst loadings.
Platinum/Scandium-Cocatalyzed Cascade Cyclization and Ring-Opening Reaction of Tertiary Amines with Substituted Salicylaldehydes to Synthesize 3-(Aminoalkyl)coumarins
oxidative dehydrogenation of α,β-C(sp3)−H bonds of tertiary amines in the presence of ambient oxygen followed by reactions with substituted salicylaldehydes is revealed. The in situ formed enamines reacted with various salicylaldehydes, which resulted in the development of a one-pot synthetic protocol involving aldol reaction, cyclization, and then ring-opening.