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Updated: May 21, 2026
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Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
Published on: July 17, 2020
3-Benzyl-7-(2,4-dichloro-phen-yl)-4H-1,3,4-thia-diazolo[2,3-c][1,2,4]triazin-4-one
Abstract:
In the title compound, C(17)H(10)Cl(2)N(4)OS, the phenyl ring and the H atoms attached to the adjacent C atom are disordered over two positions, with refined site occupancies of 0.509 (8) and 0.491 (8). The planar 4H-1,3,4-thia-diazolo[2,3-c][1,2,4]triazine ring system [maximum deviation = 0.048 (3) Å] forms dihedral angles of 76.9 (5), 74.9 (5) and 9.88 (12)°, respectively, with the major and minor parts of the disordered phenyl ring and with the dichloro-substituted benzene ring. In the crystal, pairs of C-H⋯O hydrogen bonds link the mol-ecules, forming inversion dimers with an R(2) (2)(18) graph-set motif. A short S⋯N contact of 2.801 (3) Å is observed between the dimers.
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