The photochemically induced ring contractions have been extended to 3-aryl-5,6-diphenyl-2,5-dihydro-1,2,4-triazines in order to study the effect of the electron-withdrawing and -donating groups at position 4 of the 3-aryl group. Relative reaction rates have been measured and ratio of the extrusion of N(1) / N(2) in the 2-methyl series were studied. Results are supporting our hypothetic mechanism.
|Number of pages||13|
|Journal||ACH - Models in Chemistry|
|Publication status||Published - Dec 1 1999|
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