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Title: A convenient synthesis of ethyl furo[2,3-<i style="">h</i>] flavone/chromone-8-carboxylates
Authors: Reddy, S Satyanarayana
Venkati, M
Rao, Y Jayaprakash
Sharma, Kamalesh K
Krupadanam, G L D
Keywords: 8-Formyl-7-hydroxyflavones/chromone
Diethyl bromo malonate
Ethyl bromoacetate
Issue Date: Nov-2011
Publisher: NISCAIR-CSIR, India
Abstract: The reaction of 8-formyl-7-hydroxyflavones/chromone <b>2a-i </b>with diethyl bromomalonate in the presence of K<sub>2</sub>CO<sub>3</sub>/toluene and tetrabutylammoniumbromide (TBAB) as a phase transfer catalyst under nitrogen atmosphere affords ethyl furo[2,3-<i style="">h</i>]flavone-8-carboxylates <b style="">3a-h </b>and ethyl 2-(2'-furyl)-3-methyl-furo[2,3-<i style="">h</i>]chromone-8-carboxylate <b>3i</b><b style=""> </b>(Method A).<b style=""> </b>The reaction of <b style="">2a-i</b> with ethyl bromo acetate in powdered K<sub>2</sub>CO<sub>3</sub>/dioxane affords the same products <b>3a-i </b>(Method B).
Description: 1671-1676
ISSN: 0975-0983(Online); 0376-4699(Print)
Appears in Collections:IJC-B Vol.50B(11) [November 2011]

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