Subscribe to RSS
Please copy the URL and add it into your RSS Feed Reader.
https://www.thieme-connect.de/rss/thieme/en/10.1055-s-00000084.xml
Synthesis 2010(23): 4043-4050
DOI: 10.1055/s-0030-1258261
DOI: 10.1055/s-0030-1258261
PAPER
© Georg Thieme Verlag
Stuttgart ˙ New York
Green Synthesis of Benzopyran-Annulated Thiopyrano[2,3-b]thiochromen-5(4H)-ones by Domino Knoevenagel-Hetero-Diels-Alder Reaction
Further Information
Publication History
Received
5 August 2010
Publication Date:
17 September 2010 (online)


Abstract
Benzopyran-annulated thiopyrano[2,3-b]thiochromen-5(4H)-ones have been synthesized by the domino Knoevenagel-hetero-Diels-Alder (DKHDA) reaction of 4-hydroxydithiocoumarin with O-allylated salicylaldehyde and O-propargylated salicylaldehyde in aqueous medium. The reaction requires only a single step operation and is highly regio- and stereoselective providing potentially bioactive polycyclic heterocycles in high yields.
Key words
aqueous medium - domino Knoevenagel-hetero-Diels-Alder reaction - stereoselective - regioselective - 4-hydroxydithiocoumarin