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
Regiospecific oxidation of substituted 1-benzyl-3,4-dihydro-isoquinolines using singlet oxygen
作者:Ned H. Martin、Sidney L. Champion、Phillip B. Belt
DOI:10.1016/s0040-4039(00)92819-3
日期:1980.1
Singletoxygen regiospecifically oxidizes 1-benzyl-3,4-dihydroisoquinoline. Mechanistic studies do not distinguish between a dioxetane or the alternative zwitterionic peroxide intermediate.
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