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Relevant bibliographies by topics / Pyrrolo[3,4 c]pyrazole

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Journal articles

Academic literature on the topic 'Pyrrolo[3,4 c]pyrazole'

Author: Grafiati

Published: 1 July 2022

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Journal articles on the topic "Pyrrolo[3,4 c]pyrazole"

1

Thorimbert, Serge, Candice Botuha, and Kevin Passador. "‘Heteroaromatic Rings of the Future’: Exploration of Unconquered Chemical Space." Synthesis 51, no. 02 (2018): 384–98. http://dx.doi.org/10.1055/s-0037-1611279.

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William Pitt and co-workers have created a virtual exploratory heterocyclic library ‘VEHICLe’ containing over 200 unconquered bicyclic heteroaromatic rings, synthetically feasible with potential medicinal interest. Since the publication of the 22 ‘heteroaromatic rings of the future’ by Pitt in 2009, 15 of them have been successfully synthesized as bicyclic or polycyclic forms and evaluated for applications in both biology and material science. This short review presents the critical synthesis associated with innovative synthetic methodologies of the synthetically conquered ring scaffolds from

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2

Patole, Sandip S., and Shankarsing S. Rajput. "MICROWAVE ASSISTED SYNTHESIS AND MICROBIAL EVALUATION OF -2H-PYRROLO [2, 3-C: 5, 4 C'] DIPYRAZOLE-2, 5 (7H)-BIS-CARBOTHIOAMIDE DERIVATIVES." Journal of Advanced Scientific Research 13, no. 01 (2022): 135–46. http://dx.doi.org/10.55218/jasr.202213114.

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In this study the synthesis of novel carbothiomides derivatives containing pyrazole moiety have been carried out by use of microwave assisted green and efficient process. The starting compound N-phenyl substituted succinamides 5a-b were condensed with substituted benzaldehydes furnished in to bis-heterocyclic chalcones which on treatment with thiosemicarbazide hydrochloride leads to formation of pyrralo dipyrazole carbothiomide derivatives. The structures of all synthesized compounds were determined by FT IR, 1H NMR, 13CNMR spectral analysis techniques. The pyrazole carbothiomide derivatives w

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3

Perrin, Monique, Alain Thozet, Pilar Cabildo, Rosa Ma Claramunt, Eduard Valenti, and José Elguero. "Molecular structure and tautomerism of 3,5-bis(4-methylpyrazol-1-yl)-4-methylpyrazole." Canadian Journal of Chemistry 71, no. 9 (1993): 1443–49. http://dx.doi.org/10.1139/v93-186.

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The title compound C12N6H14, 1, crystallizes in the space group P21/n (a = 8.222(2) Å, b = 27.336(8) Å, c = 5.574(2) Å, α = 90.00°, β = 100.97(4)°, γ = 90.00°), Z = 4, d = 1.308 g cm−3. The conformation about the N—C bonds linking the pyrazole rings can be defined as EZ, with "pyridine-like" nitrogen atoms in an anti disposition [Formula: see text] and "pyridine-like" and "pyrrole-like" nitrogen atoms in a syn disposition [Formula: see text] with regard to the central pyrazole. Intermolecular hydrogen bonds between the central and the terminal pyrazole ring of configuration Z form centrosymmet

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4

Das, Joydip. "Novel N-pyrimidin-4-yl-3-amino-pyrrolo [3, 4-C] pyrazole derivatives as PKC kinase inhibitors: a patent evaluation of US2015099743 (A1)." Expert Opinion on Therapeutic Patents 26, no. 4 (2015): 523–28. http://dx.doi.org/10.1517/13543776.2015.1124088.

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5

Avasthi, Kamlakar, Lakshmi Shukla, Ruchir Kant, and Krishnan Ravikumar. "Folded conformations due to arene interactions in dissymmetric and symmetric butylidene-linker models based on pyrazolo[3,4-d]pyrimidine, purine and 7-deazapurine." Acta Crystallographica Section C Structural Chemistry 70, no. 6 (2014): 555–61. http://dx.doi.org/10.1107/s2053229614009449.

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The butylidene-linker models 1-[2-(2,6-dimethylsulfanyl-9H-purin-9-yl)-2-methylidenepropyl]-4,6-bis(methylsulfanyl)-1H-pyrazolo[3,4-d]pyrimidine, C18H20N8S4, (XI), 7,7′-(2-methylidenepropane-1,3-diyl)bis[3-methyl-2-methylsulfanyl-3H-pyrrolo[2,3-d]pyrimidin-4(7H)-one], C20H22N6O2S2, (XIV), and 7-[2-(4,6-dimethylsulfanyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)-2-methylidenepropyl]-3-methyl-2-methylsulfanyl-3H-pyrrolo[2,3-d]pyrimidin-4(7H)-one, C19H21N7OS3, (XV), show folded conformations in solution, as shown by1H NMR analysis. This folding carries over to the crystalline state. Intramolecular π–π int

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6

Mague, Joel T., Shaaban K. Mohamed, Mehmet Akkurt, Talaat I. El-Emary, and Mustafa R. Albayati. "Crystal structure of 3-methyl-1-phenyl-5-(1H-pyrrol-1-yl)-1H-pyrazole-4-carbaldehyde." Acta Crystallographica Section E Structure Reports Online 70, no. 10 (2014): o1131—o1132. http://dx.doi.org/10.1107/s1600536814020984.

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In the title compound, C15H13N3O, the pyrrolyl and phenyl rings make dihedral angles of 58.99 (5) and 34.95 (5)°, respectively, with the central pyrazole ring. In the crystal, weak, pairwise C—H...O interactions across centers of symmetry form dimers, which are further associated into corrugated sheets running approximately parallel to (100)viaweak C—H...N interactions.

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7

Mague, Joel T., Shaaban K. Mohamed, Mehmet Akkurt, Hussein M. S. El-Kashef, and Mustafa R. Albayati. "Crystal structure of (E)-4-{[2-(2,4-dinitrophenyl)hydrazin-1-ylidene]methyl}-3-methyl-1-phenyl-5-(1H-pyrrol-1-yl)-1H-pyrazole." Acta Crystallographica Section E Structure Reports Online 70, no. 12 (2014): o1246—o1247. http://dx.doi.org/10.1107/s1600536814024039.

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The title compound, C21H17N7O4, is in an `extended' conformation aided by an intramolecular N—H...O hydrogen bond. The pyrazole ring makes dihedral angles of 29.17 (6), 65.47 (4) and 9.91 (7)°, respectively, with the phenyl, pyrrole and benzene rings. In the crystal, molecules are connected by pairs of N—H...O and C—H...O hydrogen bonds, forming inversion dimers which associate into ribbons running along thebaxis through complementary C—H...O interactions.

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8

Gašparová, Renáta, Martin Moncman, and Branislav Horváth. "Microwave assisted reactions of 2-[3-(Trifluoromethyl)phenyl]-4-R1-furo[3,2-b] pyrrole-5-carboxhydrazides." Open Chemistry 6, no. 2 (2008): 180–87. http://dx.doi.org/10.2478/s11532-008-0009-4.

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AbstractThe effect of microwave irradiation on the reactions of 2-[3-(trifluoromethyl)phenyl]-4-R1-furo[3,2-b]pyrrole-5-carboxhydrazides 1 with 5-arylfuran-2-carboxaldehydes 2, thiophene-2-carboxaldehyde (3) and methyl 2-formylfuro[3,2-b]pyrrole-5-carboxylates 4 has been studied. Reactions of 1 with formic and acetic acid, respectively, led to acylhydrazides 9a–c. Reaction of 1a with 4-substituted 1,3-oxazol-5(4H)-one 10 led to imidazole derivative 13. 1,2,4-Triazole-3-thiones 15a,b were synthesized by two-step reaction of 1a with potassium isothiocyanate and phenyl isothiocyanate, respectivel

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9

KAUR, MANPREET, BALDEV SINGH, and BALJIT SINGH. "1, 3-Dipolar cycloaddition reactions: Synthesis of 5-benzyl-1-(2′,4′-dibromophenyl)-3-(4″-substituted phenyl)-3a,4,6,6a-tetrahydro-1H, 5H-pyrrolo[3,4-c]pyrazole-4,6-dione derivatives." Journal of Chemical Sciences 125, no. 6 (2013): 1529–34. http://dx.doi.org/10.1007/s12039-013-0526-3.

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10

Mague, Joel T., Shaaban K. Mohamed, Mehmet Akkurt, Talaat I. El-Emary, and Mustafa R. Albayati. "Crystal structure of (E)-N-{[3-methyl-1-phenyl-5-(1H-pyrrol-1-yl)-1H-pyrazol-4-yl]methylidene}hydroxylamine." Acta Crystallographica Section E Structure Reports Online 70, no. 11 (2014): o1216—o1217. http://dx.doi.org/10.1107/s1600536814023514.

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The title compound, C15H14N4O, crystallizes with two molecules in the asymmetric unit with similar conformations (r.m.s. overlay fit for the 20 non-H atoms = 0.175 Å). In the first molecule, the dihedral angles between the planes of the central pyrazole ring and the pendant phenyl and pyrrole rings are 42.69 (8) and 51.88 (6)°, respectively, with corresponding angles of 54.49 (7) and 49.61 (9)°, respectively, in the second molecule. In the crystal, the two molecules, together with their inversion-symmetry counterparts, are linked into tetramers by O—H...N hydrogen bonds. The tetramers form lay

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