ORGN 507 |
| The photochemistry of the three dimethylpyrazines(1-3) and the four dimethylpyrimidines(4-7) has been studied by irradiating each isomer at 254 nm in the vapor phase. The primary interconversions are summarized below. Thus, 3,6 and 7 constitute a triad while 1,2,4 and 5 constitute a tetrad. Irradiation of any one member of either group leads to the formation of the other members of the group. The isomerizations include pyrazine to pyrimidine; pyrimidine to pyrazine; and pyrimidine to pyrimidine. 4 also transposes to 8 in a unique pyrimidine to pyridazine isomerization. Irradiation of 8 results in formation of 1, 2, 4 and 5, the members of the tetrad.
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Physical Organic Chemistry, Metal-Mediated Reactions, Asymmetric Reactions and Syntheses
8:00 PM-10:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster
Sci-Mix
Division of Organic Chemistry |
