Synthesis of benzo-furan derivatives-I: karanj ketone, karanjin and pongapin

Aneja, R. ; Mukerjee, S. K. ; Seshadri, T. R. (1958) Synthesis of benzo-furan derivatives-I: karanj ketone, karanjin and pongapin Tetrahedron, 2 (3-4). pp. 203-210. ISSN 0040-4020

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0040-4020(58)88041-2

Abstract

A new method of preparing benzo-furan derivatives using substituted allyl phenols has been worked out. Ozonolysis of the allyl derivatives and subsequent ring closure of the resulting o-hydroxy-acetaldehydes by means of o-phosphoric acid give good yields of karanj ketone, karanjin, pongapin and the corresponding 2-methyl furanochromone. As an alternative route oxidation of the allyl phenol in two stages using performing acid followed by periodic acid has been successfully employed in the synthesis of karanjin.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:68127
Deposited On:02 Nov 2011 11:15
Last Modified:02 Nov 2011 11:15

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