Synthesis p. 638 - 641 (1989)
Update date:2022-09-26
Topics:
Lee, Kee-Jung
Kim, Seongkon
Um, Hyunsuk
Park, Hokoon
A novel method for the synthesis of 8-oxo-3-thioxo-2,3,7,8-tetrahydro-1,2,4-triazolo<4,3-a>pyrazines 3 consists of an intramolecular condensation reaction of substituted 1,2,4-triazoline-3-thiones 9, which possess acetal and aminocarbonyl moieties, with 5 percent hydrochloric acid.This method is convenient by virtue of its simplicity and the good yields.
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(1989)Doi:10.1002/jhet.474
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(2017)
