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|Title:||Facile synthesis of various 4-carboxylic acid derivatives and their amide analogues of benzopyrans|
|Authors:||Tripathi, Anil K|
Taneja, Subhash C
|Abstract:||A series of 4-carboxyalkyl amide derivatives of benzopyrans <b style="">6a-d</b> and <b>7a-d </b>have been prepared in 40-64% overall yields. In the proposed synthetic strategy, the key intermediate 4-methyl substituted chroman <b style="">3</b> is obtained by condensing substituted phenol and mesityl oxide in presence of PPA. The required carboxylic acid function has been introduced at C-4 in benzopyran ring through a novel route.|
|Appears in Collections:||IJC-B Vol.51B(04) [April 2012]|
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