Title of article
Pd/ligand-free synthesis of thienopyranones via Cu-catalyzed coupling-cyclization in PEG 400 under ultrasound
Author/Authors
Rao، نويسنده , , Manam Sreenivasa and Haritha، نويسنده , , Meda and Chandrasekhar، نويسنده , , N. and Basaveswara Rao، نويسنده , , Mandava V. and Pal، نويسنده , , Manojit، نويسنده ,
Issue Information
هفته نامه با شماره پیاپی سال 2014
Pages
4
From page
1660
To page
1663
Abstract
A greener and practical synthesis of 5-substituted thieno[2,3-c]pyran-7-ones has been achieved via Cu-catalyzed coupling-cyclization of 3-iodothiophene-2-carboxylic acid with terminal alkynes in the presence of K2CO3 in PEG 400 under ultrasound irradiation. A range of thienopyranone derivatives were synthesized by using this inexpensive and Pd- and ligand-free methodology.
Keywords
Ultrasound , Thienopyranone , PEG , Copper
Journal title
Tetrahedron Letters
Serial Year
2014
Journal title
Tetrahedron Letters
Record number
1888417
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