Silica-sulfuric acid: a highly efficient catalyst for the synthesis of imidazo[1,2-a]pyridines using trimethysilyl cyanide or cyanohydrins

Tetrahedron Letters

Volumn 50, Issue 30, 2009, Pages 4389-4393

  Polyakov, Anatoliy I ^a   Eryomina, Vera A ^a   Medvedeva, Lidiya A ^a   Tihonova, Nadezhda I ^a   Listratova, Anna V ^b   Voskressensky, Leonid G ^b  

^a New Chemistry Horizons Laboratories Ltd   (Russian Federation)

^b PEOPLES FRIENDSHIP UNIVERSITY OF RUSSIA   (Russian Federation)

Author keywords

Catalyst; Cyanides; Cyanohydrins; Imidazopyridines; Multicomponent condensation

Indexed keywords

CYANOHYDRIN; IMIDAZO[1,2 A]PYRIDINE DERIVATIVE; SILICON DIOXIDE; SULFURIC ACID; TRIMETHYLSILYL DERIVATIVE;

ARTICLE; CATALYST; CHEMICAL REACTION; CHEMICAL STRUCTURE; POLYMERIZATION; STRECKER SYNTHESIS; SYNTHESIS;

EID: 66449125375     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2009.05.080     Document Type: Article

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14. 3 (313.41): C, 80.40; H, 6.06; N, 13.40. Found: C, 80.48; H, 5.97; N, 13.32.
15. 4S (216.05): C, 55.55; H, 3.70; N, 25.92. Found: C, 55.30; H, 3.76; N, 25.67.
16. 4O (444.20): C, 78.36; H, 5.44; N, 12.60. Found: C, 78.42; H, 5.76; N, 12.31.
17. 4 (214.11): C, 67.28; H, 6.54; N, 26.16. Found: C, 67.12; H, 6.42; N, 25.89.
18. Crystallographic data (excluding structure factors) for compound 6 have been deposited with the Cambridge Crystallographic Data Centre as supplementary publication number CCDC 712214. These data can be obtained free of charge at www.ccdc.cam.ac.uk/conts/retrieving.html.