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Title: A facile synthesis of indolo[3,2-<i style="">c</i>]xanthones
Authors: Vandana, T
Prasad, K J Rajendra
Issue Date: Apr-2005
Publisher: CSIR
Series/Report no.: <b>Int</b>.<b>Cl</b>.<b><sup>7</sup> C 07 D 209/04</b>
Abstract: Synthesis of hitherto unknown indolo[3,2-<i style="">c</i>]xanth-6-ones <b>5</b> has been achieved from the easily accessible 1-hydroxycarbazoles <b>1</b>. 1-Hydroxycarbazoles <b>1</b> on condensation with salicylic acid in the presence of ZnCl<sub>2</sub>/POCl<sub>3</sub> give 2,4-disalicyloyl-1-hydrox­y­carba­zoles&nbsp; <b>3</b> and <b>2</b>-salicyloyl-1-hydroxycarbazoles 4. Acid catalysed cyclisation of compounds <b>4</b> yield the title compounds.
Description: 815-818
ISSN: 0975-0983(Online); 0376-4699(Print)
Appears in Collections:IJC-B Vol.44B(04) [April 2005]

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