A modified Bischler-Napieralski procedure for the synthesis of 3-aryl-3,4-dihydroisoquinolines
摘要:
A modification of the Bischler-Napieralski reaction for the cyclization of (1,2-diphenylethyl)amides to the 3-aryl-3,4-dihydroisoquinolines is presented. Elimination of the amide group as the nitrile via the retro-Ritter reaction is avoided by its conversion to an N-acyliminium intermediate with oxalyl chloride-FeCl3. Removal of the oxalyl group in refluxing MeOH-sulfuric acid provides the 3,4-dihydroisoquinolines in moderate to high yields. The method is also highly effective with (2-phenylethyl)amides.
The Photoredox-Catalyzed Meerwein Addition Reaction: Intermolecular Amino-Arylation of Alkenes
作者:Durga Prasad Hari、Thea Hering、Burkhard König
DOI:10.1002/anie.201307051
日期:2014.1.13
A variety of amides are efficiently accessible under mild conditions by intermolecular amino‐arylation using a photo Meerwein addition with visible light. The reaction has a broad substrate scope, tolerates a large range of functional groups, and was applied to the synthesis of a 3‐aryl‐3,4‐dihydroisoquinoline.
Oxyarylation and Aminoarylation of Styrenes Using Photoredox Catalysis
作者:Gabriele Fumagalli、Scott Boyd、Michael F. Greaney
DOI:10.1021/ol401940c
日期:2013.9.6
A three-component coupling of styrenes is reported, using photoredoxcatalysis to achieve simultaneous arylation and C–O or C–N bond formation across the styrene double bond.
<i>γ</i>-Amino Butyric Acid (GABA) Synthesis Enabled by Copper-Catalyzed Carboamination of Alkenes
作者:Nengbo Zhu、Ting Wang、Liang Ge、Yajun Li、Xinhao Zhang、Hongli Bao
DOI:10.1021/acs.orglett.7b01969
日期:2017.9.15
γ-Amino butyric acid (GABA) is the chief inhibitory neurotransmitter in the mammalian central nervous system. Many GABA derivatives are used clinically to prevent or treat neurodegenerative diseases. Copper-catalyzed carboamination of alkenes offers an efficientmethod to fashion the core structure of GABA derivatives from alkenes. In this reaction, acetonitrile serves as the source of the carbon and
Metal‐Organic Layers Catalyze Photoreactions without Pore Size and Diffusion Limitations
作者:Ruoyu Xu、Tasha Drake、Guangxu Lan、Wenbin Lin
DOI:10.1002/chem.201803635
日期:2018.10.22
limitation and slow diffusion, which are detrimental for photoreactions. Metal‐organic layers (MOLs) have unique ultrathin 2D monolayer structures and overcome pore size and diffusion limitations. Here, the synthesis of photoactive Zr‐RuBPY MOL based on Zr‐oxo clusters and [Ru(bpy)3]2+‐containing linkers is reported as well as its application in photocatalytic [2+2] cyclizations of enones and Meerwein
A class of pyrazole derivatives is described for use in treating p38 kinase medicated disorders. Compounds of particular interest are defined by Formula IA
wherein R
1
, R
2
, R
3
and R
4
are as described in the specification.