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Khan MA, Batool F, Khatoon A, Sadiq R, Rahman S, Basha FZ. Solvent-free protocol for the green synthesis of benzamide analogs of dibenzoazepine. ACTA ACUST UNITED AC 2017. [DOI: 10.5155/eurjchem.8.2.179-182.1567] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Acosta LM, Jurado J, Palma A, Cobo J, Glidewell C. Five closely related 4-chloro-6,11-dihydro-5H-benzo[b]pyrimido[5,4-f]azepines: similar molecular structures but different supramolecular assemblies. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2015; 71:1062-8. [DOI: 10.1107/s2053229615020811] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 11/02/2015] [Indexed: 11/10/2022]
Abstract
Dibenz[b,f]azepine (DBA) is a privileged 6-7-6 tricyclic ring system of importance in both organic and medicinal chemistry. Benzo[b]pyrimido[5,4-f]azepines (BPAs), which also contain a privileged 6-7-6 ring system, are less well investigated, probably because of a lack of straightforward and versatile methods for their synthesis. A simple and versatile synthetic approach to BPAs based on intramolecular Friedel–Crafts alkylation has been developed. A group of closely-related benzo[b]pyrimido[5,4-f]azepine derivatives, namely (6RS)-4-chloro-6,11-dimethyl-6,11-dihydro-5H-benzo[b]pyrimido[5,4-f]azepine, C14H14ClN3, (I), (6RS)-4-chloro-8-hydroxy-6,11-dimethyl-6,11-dihydro-5H-benzo[b]pyrimido[5,4-f]azepine, C14H14ClN3O, (II), (6RS)-4-<!?tlsb=-0.14pt>chloro-8-methoxy-6,11-dimethyl-6,11-dihydro-5H-benzo[b]pyrimido[5,4-f]azepine, C15H16ClN3O, (III), and (6RS)-4-chloro-8-methoxy-6,11-dimethyl-2-phenyl-6,11-dihydro-5H-benzo[b]pyrimido[5,4-f]azepine, C21H20ClN3O, (IV), has been prepared and their structures compared with the recently published structure [Acosta-Quinteroet al.(2015).Eur. J. Org. Chem.pp. 5360–5369] of (6RS)-4-chloro-2,6,8,11-tetramethyl-6,11-dihydro-5H-benzo[b]pyrimido[5,4-f]azepine, (V). All five compounds crystallize as racemic mixtures and they have very similar molecular conformations, with the azepine ring adopting a boat-type conformation in each case, although the orientation of the methoxy substituent in each of (III) and (IV) is different. The supramolecular assemblies in (II) and (IV) depend upon hydrogen bonds of the O—H...N and C—H...π(arene) types, respectively, those in (I) and (V) depend upon π–π stacking interactions involving pairs of pyrimidine rings, and that in (III) depends upon a π–π stacking interaction involving pairs of phenyl rings. Short C—Cl...π(pyrimidine) contacts are present in (I), (II) and (IV) but not in (III) or (V).
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Manjunath BC, Vinay Kumar KS, Madan Kumar S, Sadashiva MP, Lokanath NK. 5-[(4-Benzyl-1H-1,2,3-triazol-1-yl)meth-yl]-5H-dibenzo[b,f]azepine. Acta Crystallogr Sect E Struct Rep Online 2013; 69:o1233. [PMID: 24109324 PMCID: PMC3793737 DOI: 10.1107/s1600536813018412] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 07/03/2013] [Indexed: 11/25/2022]
Abstract
In the title compound, C24H20N4, the azepine ring adopts a boat conformation and the dihedral angle between the benzene rings fused to it is 57.95 (8)°. The bond-angle sum at the azepine N atom is 346.6°, indicating a significant deviation from planarity. The triazole ring subtends a dihedral angle of 71.45 (10)° with the terminal phenyl group. A weak intra-molecular C-H⋯Na (a = azepine) inter-action occurs, which closes an S(6) ring.
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Affiliation(s)
- B. C. Manjunath
- Department of Studies in Physics, Manasagangotri, University of Mysore, Mysore 570 006, India
| | - K. S. Vinay Kumar
- Department of Studies in Chemistry, Manasagangotri, University of Mysore, Mysore 570 006, India
| | - S. Madan Kumar
- Department of Studies in Physics, Manasagangotri, University of Mysore, Mysore 570 006, India
| | - M. P. Sadashiva
- Department of Studies in Chemistry, Manasagangotri, University of Mysore, Mysore 570 006, India
| | - N. K. Lokanath
- Department of Studies in Physics, Manasagangotri, University of Mysore, Mysore 570 006, India
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