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Investigation of the one-pot synthesis ofN-(5,6,7,8-tetrahydro-7,7-dimethyl-2,5-dioxo-2H-1-benzopyran-3-yl-2,5-dioxo-2H-1-benzopyran-3-yl)benzamide

✍ Scribed by Kočevar, Marijan ;Polanc, Slovenko ;Verček, Bojan ;Tišler, Miha

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
294 KB
Volume
1990
Category
Article
ISSN
0947-3440

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✦ Synopsis

Abstract

A detailed investigation of the reaction of hippuric acid (2) with dimedone (1) and triethyl orthoformate or other one‐carbon sources in acetic anhydride yielding the benzopyran derivative 3 and many byproducts is described. An explanation of this complex process, several attempts to optimize it, and some new approaches to 3 are given.

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