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IJC-B Vol.50B(11) [November 2011] >

Title: A convenient synthesis of ethyl furo[2,3-h] 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 2a-i with diethyl bromomalonate in the presence of K2CO3/toluene and tetrabutylammoniumbromide (TBAB) as a phase transfer catalyst under nitrogen atmosphere affords ethyl furo[2,3-h]flavone-8-carboxylates 3a-h and ethyl 2-(2'-furyl)-3-methyl-furo[2,3-h]chromone-8-carboxylate 3i (Method A). The reaction of 2a-i with ethyl bromo acetate in powdered K2CO3/dioxane affords the same products 3a-i (Method B).
Page(s): 1671-1676
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-0983(Online); 0376-4699(Print)
Source:IJC-B Vol.50B(11) [November 2011]

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