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5-(1-Benzyl-1H-1,2,3-triazol-4-yl)-2,1,3-benzoxadiazole.

ABSTRACT: In the title compound, C(15)H(11)N(5)O, which was prepared as part of a study to identify fluoro-genic substrates for the Cu-catalysed azide-alkyne cyclo-addition (CuAAC) reaction, the benzoxa-diazole unit and the triazole ring are much more closely coplanar [dihedral angle = 10.92?(7)°] than either is to the benzyl group [dihedral angles = 69.13?(3)° and 78.20?(4)°, respectively]. The crystal structure features two different sets of weak inter-molecular C-H?N inter-actions between adjacent benzoxadiazole and triazole rings, forming a chain that propagates in the [-110] direction parallel to the ab plane.

SUBMITTER: Key JA

PROVIDER: S-EPMC3515234 | biostudies-literature | 2012 Nov

REPOSITORIES: biostudies-literature

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5-(1-Benzyl-1H-1,2,3-triazol-4-yl)-2,1,3-benzoxadiazole.

Key Jessie A JA Cairo Christopher W CW McDonald Robert R

Acta crystallographica. Section E, Structure reports online 20121013 Pt 11

In the title compound, C(15)H(11)N(5)O, which was prepared as part of a study to identify fluoro-genic substrates for the Cu-catalysed azide-alkyne cyclo-addition (CuAAC) reaction, the benzoxa-diazole unit and the triazole ring are much more closely coplanar [dihedral angle = 10.92 (7)°] than either is to the benzyl group [dihedral angles = 69.13 (3)° and 78.20 (4)°, respectively]. The crystal structure features two different sets of weak inter-molecular C-H⋯N inter-actions between adjacent benz ...[more]

PMID: 23284454

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5-(4-Hexyl-1H-1,2,3-triazol-1-yl)-2,1,3-benzoxadiazole.

Project description:The title compound, C(14)H(17)N(5)O, a 1,2,3-triazole derivative of benzoxadiazole (C(14)H(17)N(5)O), was synthesized via Cu-catal-ysed azide-alkyne cyclo-addition (CuAAC) from the corres-ponding n-octyne and 4-azido-benzoxadiazole. The benz-oxa-diazole and triazole rings show a roughly planar orientation [dihedral angle between the ring planes = 12.18?(5)°]. The alkane chain adopts a zigzag conformation, which deviates from the central triazole ring by 20.89?(6)°. These two torsion angles result in an overall twist to the structure, with a dihedral angle of 32.86?(7)° between the benzoxadiazole group and the hexyl chain. The crystal structure features C-H?N hydrogen bonds leading to chains propagating along [2-10] and offset parallel stacking inter-actions of the triazole and benzoxadiazole rings. The centroid of the extended ?-system formed by the benzoxadiazole and triazole rings (14 atoms total) was calculated; the centroid-centroid distance was 4.179?Å, interplanar separation was 3.243?Å, and the resulting offset was 2.636?Å.

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1-[1-(2,1,3-Benzoxadiazol-5-ylmeth-yl)-1H-1,2,3-triazol-4-yl]hexan-1-one.

Project description:The title compound, C(15)H(17)N(5)O(2), was synthesized as part of a series of benzoxadiazole analogs which were examined for fluorescent properties by Cu-catalysed azide-alkyne cyclo-addition (CuAAC) of a 4-azido-methyl-benzoxadiazole substrate. The structure shows a nearly coplanar orientation of the hexa-none keto group and the 1,2,3-triazole ring [dihedral angle = 4.3?(3)°], while the benzoxadiazole and triazole groups are much more severely inclined [dihedral angle = 70.87?(4)°]. In the crystal, weak C-H?N inter-actions connect translationally-related triazole rings, while another set of C-H?N inter-actions is formed between inversion-related benzoxadiazole units, forming a three-dimensional network. The crystal studied was a non-merohedral twin with refined value of the twin fraction of 0.2289?(16).

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3-[(1-Benzyl-1H-1,2,3-triazol-4-yl)methyl]-1,5-dimethyl-1,5-benzodiazepine-2,4-dione.

Project description:The title compound, C(21)H(21)N(5)O(2), is a 1,4-dimethyl-1,2,3-triazole having dimethyl-benzodiazepindione and phenyl substituents on each methyl group; the substituents are positioned on opposite sides of the five-membered ring. The seven-membered fused-ring of the larger substituent adopts a boat-shaped conformation (with the methine C atom as the prow).

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Project description:In the title compound, C18H16N4OS, the six-membered heterocycle of the benzo-thia-zine fragment exhibits a screw-boat conformation. The dihedral angles between the plane through the triazole ring and those through the fused and terminal benzene rings are 76.68 (11) and 71.0 (1)°, respectively; the benzene rings are nearly perpendicular [dihedral angle = 79.6 (1)°]. In the crystal, mol-ecules are linked by C-H⋯N and C-H⋯O inter-actions, forming a three-dimensional network.

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3-[(1-Benzyl-1H-1,2,3-triazol-5-yl)methyl]-1,5-dimethyl-1,5-benzodiazepine-2,4-dione monohydrate.

Project description:In the title compound, C(21)H(21)N(5)O(2)·H(2)O, the seven-membered ring adopts a boat-shaped conformation with the methine C atom as the prow. In the crystal, the water mol-ecule links adjacent mol-ecules by O-H?O and O-H?N hydrogen bonds into a zigzag chain running along the c axis of the monoclinic cell.

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Project description:The triazole ring of the title compound, C20H20N4O, is normal to the central benzene ring, making a dihedral angle of 90.0 (3)°, and forms a dihedral angle of 69.2 (3)° with the terminal phenyl ring. The dihedral angle between the phenyl and benzene rings is 88.2 (3)°. The atoms of the terminal propenyl group are disordered over two sets of sites, with a site-occupancy ratio of 0.663 (13):0.337 (13). In the crystal, C-H⋯N contacts lead to the formation of a layer structure extending parallel to (011). Two weak C-H⋯π inter-actions are also observed.

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3-[(1-Benzyl-1H-1,2,3-triazol-5-yl)meth-yl]-6-bromo-2-phenyl-3H-imidazo[4,5-b]pyridine.

Project description:There are two crystallographically independent mol-ecules in the asymmetric unit of the title compound, C(22)H(17)BrN(6). The dihedral angles between the imidazo[4,5-b]pyridine mean plane and the phenyl rings are 20.4 (2) and 24.0 (2)° in the two mol-ecules. The orientation of triazoles compared to the imidazo[4,5-b]pyridine system is almost the same in both mol-ecules, with dihedral angles of 64.2 (2) and 65.1 (2)°. However, the main difference between the two mol-ecules lies in the arrangement of the phenyl groups compared to imidazo[4,5-b]pyridine in each mol-ecule. Indeed, in the first mol-ecule the dihedral angle between the plane of the phenyl ring and that of the imidazo[4,5-b]pyridine system is 67.7 (2)°, while in the second mol-ecule the plane of the phenyl ring is almost perpendicular to that of the imidazo[4,5-b]pyridine system with a dihedral angle of 86.0 (2)°.

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