Cobalt catalysed aminocarbonylation of thiols in batch and flow for the preparation of amides
作者:Jose Maria Orduña、Gema Domínguez、Javier Pérez-Castells
DOI:10.1039/d1ra04736a
日期:——
The synthesis of amides from thiols through a cobalt-catalyzed aminocarbonylation is shown. After optimizing all the reaction parameters, the methodology makes possible the obtention of amides with variable yields, while competing reactions such as the formation of disulfides and ureas can be limited. The process works well with aromatic thiols with electron donating groups (EDG) whereas other thiols
Synthesis and Photo-oxygenation of Some Substituted 1-Benzyl-3,4-dihydroisoquinolines. Mechanism of Enamine Photo-oxygenation
作者:Ned H. Martin、Charles W. Jefford
DOI:10.1002/hlca.19820650314
日期:1982.5.5
Bischler-Napieralski cyclization is described. Competitive methylene blue sensitized photo-oxygenation experiments allowed the determination of relative rates of photo-oxygenation of 1-benzyl-3,4-dihydroisoquinolines, Substituents were shown to affect both the equilibrium concentration of the tautomeric enamine and the overall photo-oxygenation rate. After correcting for differences in enamine concentration, the relative
Abstract Twenty-five amides were synthesized in almost quantitative yields by microwave-assisted condensation of arylacetic acids and 2-aryl-ethylamines undersolventlessconditions. The N-arylethyl-arylacetylamides are intermediates of the corresponding isoquinoline derivates. Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications® to
MARTIN, N. H.;JEFFORD, C. W., HELV. CHIM. ACTA, 1982, 65, N 3, 762-774
作者:MARTIN, N. H.、JEFFORD, C. W.
DOI:——
日期:——
Enhancement of the carbamate activation rate enabled syntheses of tetracyclic benzolactams: 8-oxoberbines and their 5- and 7-membered C-ring homologues
作者:Hiroaki Kurouchi
DOI:10.1039/d0ob02096f
日期:——
A route to the direct amidation of aromatic-ring-tethered N-carbamoyl tetrahydroisoquinoline substrates was developed. This route enabled general access to 8-oxoberberines and their 5- and 7- membered C-ring homologues. It overcomes the undesired tandem side-reactions that result in the destruction of the isoquinoline backbone, which inevitably occurred under our previously reported superacidic carbamate