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Volumn , Issue 19, 2008, Pages 2941-2944

Efficient synthesis of imidazo[2,1-b][1,3]benzothiazoles and 9H-imidazo-[1,2-a][1,3]benzimidazoles under solvent-free conditions

Author keywords

9H imidazo 1,2 a 1,3 benzimidazoles; Heterocycles; Imidazo 2,1 b 1,3 benzothiazoles; Imidazoline 2,4,5 trione; Multicomponent reactions; Solvent free synthesis

Indexed keywords

2 AMINOBENZIDAZOLE DERIVATIVE; 2 AMINOBENZOTHIAZOLE DERIVATIVE; 9H IMIDAZO[1,2 A][1,3]BENZIMIDAZOLE DERIVATIVE; BENZALDEHYDE DERIVATIVE; BENZIMIDAZOLE DERIVATIVE; BENZOTHIAZOLE DERIVATIVE; IMIDAZO[2,1 B][1,3]BENZOTHIAZOLE DERIVATIVE; IMIDAZOLINE 2,4,5 TRIONE; IMIDAZOLINE DERIVATIVE; UNCLASSIFIED DRUG;

EID: 57649134978     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-0028-1083623     Document Type: Article
Times cited : (14)

References (30)
  • 1
    • 84890597202 scopus 로고    scopus 로고
    • Zhu, J, Bienaymé, H, Eds, Wiley-VCH: Weinheim
    • (a) Multicomponent Reactions; Zhu, J.; Bienaymé, H., Eds.; Wiley-VCH: Weinheim, 2005.
    • (2005) Multicomponent Reactions
  • 5
    • 57649127596 scopus 로고    scopus 로고
    • Solvent-free Organic Synthesis
    • Tanaka, K, Ed, Wiley-VCH: Weinheim
    • (a) Solvent-free Organic Synthesis, 1st reprint; Tanaka, K., Ed.; Wiley-VCH: Weinheim, 2004.
    • (2004) 1st reprint
  • 7
    • 85177098147 scopus 로고    scopus 로고
    • Katritzky, A. R, Rees, C. W, Scriven, E. V. F, Eds, Pergamon: London, Chap. 4, 95-122; and references therein
    • Calderwood, D. J.; Jones, C. G. P. In Comprehensive Heterocyclic Chemistry II, Vol. 8; Katritzky, A. R.; Rees, C. W.; Scriven, E. V. F., Eds.; Pergamon: London, 1996, Chap. 4, 95-122; and references therein.
    • (1996) Comprehensive Heterocyclic Chemistry II , vol.8
    • Calderwood, D.J.1    Jones, C.G.P.2
  • 14
    • 57649118162 scopus 로고    scopus 로고
    • George, P.; De Peretti, D.; Roy, J.; Schmitt, J. P.; Sevrin, M. EP 607076A1, 1994; Chem. Abstr. 1994, 121, 157646e.
    • George, P.; De Peretti, D.; Roy, J.; Schmitt, J. P.; Sevrin, M. EP 607076A1, 1994; Chem. Abstr. 1994, 121, 157646e.
  • 29
    • 57649128724 scopus 로고    scopus 로고
    • Procedure for the Preparation of 2-(4-Methylphenyl)-N3, E)-1-(4-methylphenyl)methylidene] imidazo[2,1-b, 1,3]benzothiazol-3-amine (6a) A mixture of 2-aminobenzothiazole (0.30 g, 2 mmol, 4-methylbenzaldehyde (0.60 g, 5 mmol, and imidazoline-2,4,5-trione (0.34 g, 3 mmol) was stirred at 200°C for 5 min. Then, the reaction mixture was cooled to r.t. and the residue was purified by column chromatography using n-hexane-EtOAc (1:3) as eluent. The solvent was removed and the product was recrystallized from n-hexane- EtOAc (1:1, The product 6a was obtained as yellow crystals; yield 0.70 g (92, relative to 2-aminobenzothiazole, IR (KBr, 1603, 1495, 1479, 1379, 1352, 1315, 1175, 1146, 1109, 820, 748 cm-1. 1H NMR (500.1 MHz, CDCl3, δ, 2.37, 2.45 (2 x s, 6 H, 2 x CH3, 7.19 (d, J, 7.4 Hz, 2 H, 2 x CH, 7.29-7.32 (m, 3 H, 3 x CH, 7.42 dd
    • 4 (372.38): C, 70.96; H, 3.79; N, 15.05. Found: C, 71.0; H, 3.8; N, 14.9.
  • 30
    • 57649119390 scopus 로고    scopus 로고
    • Selected X-ray Crystailographic Data for Compound 6a C 24H19N3S, monoclinic, space group, P21/n, a, 12.7579 (12) Å, b, 7.5112 (7) Å, c, 21.2243 (20) Å, β, 91.626 (2)°, V, 2033.03 (3) Å3, T, 295 (2) K, Z, 4, Dcalcd, 1.25 g cm-3, μ, 0.173 mm-1, 2245 observed reflections, final R1, 0.079, wR 2, 0.149 and for all data R1, 0.137, wR2, 0.172. CCDC 671151 contains the supplementary crystallographic data for the structure reported in this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/cif
    • 2 = 0.172. CCDC 671151 contains the supplementary crystallographic data for the structure reported in this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/cif.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.