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San Diego, CA, United States

Braganza J.F.,0770 Science Center Drive | Bernier L.,0770 Science Center Drive | Botrous I.,0770 Science Center Drive | Collins M.R.,0770 Science Center Drive | And 8 more authors.
Tetrahedron Letters | Year: 2015

An efficient synthesis of 6-substituted-pyrazolo[1,5-a]pyridines via an intramolecular cyclization of 1-amino-2-triethyl-silanylethynyl-pyridinium salts has been developed. The cyclization reaction proceeds in the presence of catalytic silver(I) and gold(III) salts to give 2-silyl pyrazolo[1,5-a]pyridines; while the use of stoichiometric silver(I) fluoride predominantly gives the des-silyl heterocycles. © 2015 Elsevier Ltd. All rights reserved. Source

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