Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
On the Ring-Opening Reactions of the Furan Compounds. II. The Synthesis of γ, ζ, ι-Triketobrassylic Acid from Difurfurylideneacetone
Hiroshi Midorikawa
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1953 Volume 26 Issue 6 Pages 317-318

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Abstract

The γ,ζ,ι-triketobrassylic acid which is a new triketo-dicarboxylic acid was obtained from difurfurylidene acetone by the ring opening.
The similar ring opening did not take place in difurfurylidene cyclohexanone, difurfurylidene-methyl-ethyl ketone and furfurylidenediethyl ketone which have a branched chain at the carbon atom between the furfurylidene and the carbonyl groups. It seems that the ring opening reaction is hindered by the-presence of the branched chain.

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