A number of novel thieno[2,3-b]pyridines were prepared from the reaction of 1 with unsaturated haloalkanes, and by the reaction of the amino ketones 9 and 10 with DMF dimethylacetal or triethyl orthoformate. The synthesis of novel thieno[2,3-c] and [3,2-c] pyridines, and a thieno[2,3-b;4,5-b']dipyridine are also reported.
Straightforward Synthesis of 2-Acetyl-Substituted Benzo[b]thiophenes
作者:Julien Debray、Florence Popowycz、Marc Lemaire
DOI:10.1055/s-0032-1317674
日期:——
Described herein is a green one-step protocol for the preparation of substituted 2-acetylbenzo[b]thiophenes from commercially available aromatic halides. This efficient method has the advantage of using water as the reaction medium, resulting in a high yield of pure cyclized products. Two scaffold types have been prepared using this general procedure: 2-acetylbenzo[b]thiophenes and 2-acetyl-3-aminobenzo[b]thiophenes, both crystallized directly from the reaction mixture, due to their low solubility with water, and without the need for an additional purification step.
GUERRERA F.; SIRACUSA M. A.; TORNETTA B., FARMACO. ED. SCI. <FSTE-AX>, 1976, 31, NO 1, 21-30