Photochemistry of the Nitrogen-Thiocarbonyl Systems, Part 31. Photoreaction of Arenecarbothioamides with 2-Vinylfuran Analogues. The Formation of Tetracyclic Indoles and 2,3-Diaryl-2-pyrrolin-5-ones.
Photoreaction of thiobenzamide (1) with 2-vinylfuran analogues (2) in benzene solution gives 1H-benzo[g]furo[2,3-e]indole derivatives (3,5).
Photochemistry of the Nitrogen-Thiocarbonyl Systems, Part 31. Photoreaction of Arenecarbothioamides with 2-Vinylfuran Analogues. The Formation of Tetracyclic Indoles and 2,3-Diaryl-2-pyrrolin-5-ones.
Photoreaction of arenecarbothioamides (1) with 2-vinylfuran analogues (2, 6) in benzene aolution gave tetracyclic indole systems (3, 8) via photogenerated diarylethylene intermediates. In the case of reaction of furan- or thiophenecarbothioamide (1c, 1d) with 2-furanacrylic acid (2-i), 2, 3-diaryl-2-pyrrolin-5-ones (5c-i, 5d-i) were obtained.