期刊
TETRAHEDRON LETTERS
卷 51, 期 17, 页码 2297-2300出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2010.02.118
关键词
Domino-Knoevenagel-hetero-Diels-Alder reaction; Unactivated alkynes; 4-Hydroxy dithiocoumarin; Reaction in aqueous medium
资金
- CSIR (New Delhi)
- DST (New Delhi)
The synthesis of novel pentacyclic benzopyran-annulated thiopyrano[2,3-b] thiochromen-5(4H)-ones has been described by domino-Knoevenagel-hetero-Diels-Alder reaction of 4-hydroxy dithiocoumarin and O-propargylated salicylaldehyde in aqueous medium and in the absence of any catalyst. The single step reaction is highly regioselective and provides polycyclic heterocycles in high yields. (C) 2010 Elsevier Ltd. All rights reserved.
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