Monocyclic 1,2,3-triazines reacted with Grignard reagents to form adducts due to N-2 and C-5 attack together with p-su bstituted acrylaldehydes and N-substituted pyrazoles; the results show that the N-2, C-4, and C-5 positions are reactive towards Grignard reagents.
Alkyl substituted monocyclic 1,2,3-triazines and their 1-and %oxides have been synthesized ; catalytic reduction (on Pd-C) of the triazines afforded their 2,5-dihydro compounds.ALTHOUGH the chemical and physical properties of 1,2,3triazines have been of interest and condensed 1,2,3-triazines have been widely investigated, little is. known concerning the monocyclic 1,2,3-triazines (1) .l The preparation of compounds (1) has been limited to cases in which R1 = R2 = R3 = alkyl, aryl, or halogen, or a group (alkylamino, alkoxy, etc.) introduced by nucleophilic substitution of halogen. 9 2t
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