Helvetica Chimica Acta p. 762 - 774 (1982)
Update date:2022-08-02
Topics:
Martin, Ned H.
Jefford, Charles W.
The synthesis of a series of substituted 1-benzyl-3,4-dihydroisoquinolines by 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 rate data provided a diagnostic probe of the reaction mechanism, which involves transfer of charge in the rate-limiting step.
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(1982)
