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2005
Triazole derivatives
R 0280
Reactions of 3-Azido-1,2,4-triazole with Electrophiles. — Alkylation of title com(II) with bromoacetone (III), methyl vinyl ketone (V), and oxiranes (VII) fur22- 130 pound
nishes a mixture of N-substituted 3- and 5-azido-1,2,4-triazoles, 3-azido compounds,
e.g. (VIII), prevailing. In reactions introducing heterocyclic substituents like the
3,5-dinitro-1,2,4-triazole derivatives (IX) N1-substitution to (X) takes place selectively
together with the formation of the corresponding triazol-5-ones (XI) (no yields given).
Bromination affords the 5-bromo product (XIII) arising from an intermediate N-bromo
derivative. — (KOFMAN, T. P.; KRASNOV, K. N.; Russ. J. Org. Chem. 40 (2004) 11,
1651-1656; St. Petersburg State Technol. Inst., St. Petersburg 198013, Russia; Eng.)
— H. Haber
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