

PECULIARITIES OF 4-METHALLYL-5-METHALLYLAMINO-1,2,4-TRIAZOLE-3-THIONE HALOGENATION

Abstract
Bromination and iodination of 4-methallyl-5-methallylamino-1,2,4-triazole-3-thione lead to the annulation of five- and six-membered thiazaheterocycles, respectively. The usage of halogen excess does not give the product of 5-methallylamino group cyclization – the product of the bromine addition was isolated.
Keywords
[1,3]thiazolo[2,3-c][1,2,4]triazole, 1,2,4-triazole, [1,2,4]triazolo[3,4-b][1,3]thiazine, electrophilic cyclization, halogenation
Latvian Institute of Organic Synthesis - Aizkraukles iela, 21, Riga, LV-1006, Latvia - hgs@osi.lv