Novel [4+2] cycloaddition between thiobenzophenone and aryl-substituted alkenes via photoinduced electron transfer.
The [4+2] cycloaddition products between thiobenzophenone (1) and arylalkenes (2) were obtained in the presence of (thia)pyrylium salts (sensitizer=3 or 4) as electron transfer photosensitizers. Although both radical cations 1*+ and 2*+ are generated, only the former is involved in the process.
INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina.
Juan E
JE
Argüello
Raúl
R
Pérez-Ruiz
Miguel A
MA
Miranda