Ivanov SM, Koltun DS. Synthesis and crystal structures of 7,8-bromo (dibromo)-3-
tert-butylpyrazolo[5,1-
c][1,2,4]triazines.
Struct Chem 2021;
32:1553-1562. [PMID:
33814866 PMCID:
PMC8006638 DOI:
10.1007/s11224-021-01768-0]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 03/15/2021] [Indexed: 11/26/2022]
Abstract
Single crystal structures in a series of 7-bromo-, 8-bromo-, and 7,8-dibromo-3-tert-butylpyrazolo[5,1-c][1,2,4]triazin-4(1H)-ones have been investigated by X-ray diffraction. Novel 7-bromo- and 7,8-dibromo-3-tert-butylpyrazolo[5,1-c][1,2,4]triazines were synthesized by reduction of triazine carbonyl with dehydrative aromatization in acidic media, and their XRD structural features were compared with that of the 4-oxo analogs. The lengths and bond angles and the packing of molecules in crystals have been considered. Non-valence interactions for some of the studied compounds were observed. Correlations between the presence of bromine atoms at different positions and structural features are determined.
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SUPPLEMENTARY INFORMATION
The online version contains supplementary material available at 10.1007/s11224-021-01768-0.
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