Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5266432 | Tetrahedron Letters | 2013 | 5 Pages |
Abstract
A series of doubly-propargylated N-methylcarbazole and carbazole derivatives were synthesized in good to excellent isolated yields in (bmim)PF6 using triflic acid (10 mol %). The use of bismuth nitrate (20 mol %) instead of triflic acid allowed stepwise propargylation employing two different propargylic alcohols, to prepare mixed bis-propargylated carbazoles. Simple product isolation, mild reaction conditions, and repeated recycling and reuse of (bmim)PF6 are added advantages of this IL-mediated synthetic method.
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Authors
G.G.K.S. Narayana Kumar, Kenneth K. Laali,