2.2.4.6- Tetraphenyldihydro-l,3.5-triazine

In an attempt to explain the peculiar photochemical behavior of 2,2,4,6-tetra-phenyldihydro-l,3,5-triazine, Maeda and coworkers carried out extensive studies on the annular tautomerism of this compound and its variously substituted derivatives both in solution and in the solid state. Thus, spectroscopic studies ( H NMR, IR, and UV) of 2,2,4,6-tetraphenyldihydro-l,3,5-triazine 105 (R = Ph) and some... 

Tetraphenyldihydro-l,3,5-triazine (22) has been found to undergo photochemical reactions. Photolysis was carried out in benzene for 5 h and six products were isolated by chromatography. The products (87) and (88) were separated and identified Scheme 18 is proposed to account for their formation <88BCJ2487, 89BCJ3l7i>. 

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