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Volumn 52, Issue 5, 2011, Pages 605-608

A new laccase-catalyzed domino process and its application to the efficient synthesis of 2-aryl-1H-benzimidazoles

Author keywords

Aerobic oxidation; Domino reactions; Laccase; N Heterocycles

Indexed keywords

1,2 PHENYLENEDIAMINE; 2 ARYL 1H BENZIMIDAZOLE; BENZALDEHYDE; BENZIMIDAZOLE DERIVATIVE; LACCASE; OXIDIZING AGENT; OXYGEN; UNCLASSIFIED DRUG;

EID: 78651102272     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2010.11.145     Document Type: Article
Times cited : (37)

References (50)
  • 2
  • 47
    • 37049090468 scopus 로고
    • For all experiments commercially available laccase (EC 1.10.3.2) from A. bisporus (Fluka) was used. Laccase activity was determined according to
    • For all experiments commercially available laccase (EC 1.10.3.2) from A. bisporus (Fluka) was used. Laccase activity was determined according to (a) Land, E. J. J. Chem. Soc., Faraday Trans. 1993, 89, 803
    • (1993) J. Chem. Soc., Faraday Trans. , vol.89 , pp. 803
    • Land, E.J.1
  • 49
    • 78651088343 scopus 로고    scopus 로고
    • note
    • General procedure for synthesis of 5a-g: 1.0 equiv 6 (0.2 mmol) [6b (0.13 mmol), 6c (0.18 mmol), 6d (0.11 mmol), respectively] and 1.0 equiv o-phenylenediamine (1a) were dissolved in phosphate buffer (14 mL, 0.2 M, pH 6.0) or a phosphate buffer/methanol mixture (see Table 1). 31 U laccase from Agaricus bisporus were added. The reaction mixture was shaken with a shaking frequency of 850 rpm using a liquid phase synthesis system 'Synthesis 1' (Heidolph) for 3-18 h (see Table 1) at room temperature under air until the substrates had been fully consumed. Alternatively, the reaction could be performed using a magnetic stirrer at high stirring speed. The reaction mixture was saturated with sodium chloride and filtered through a Büchner funnel. For isolation of products 5a-d 2 M KOH (1 mL) was added before filtration. The filter cake was washed with 15% sodium chloride solution (20 mL) and water (2 mL) and dried at room temperature to yield pure heterocycles 5a-g (NMR). Analytically pure compounds could be obtained via recrystallization.
  • 50
    • 78651083203 scopus 로고    scopus 로고
    • note
    • +] 274.0412; found 274.0416.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.