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Reactions of squaric acid and some derivatives with thionyl chloride/N,N-dimethylformamide

โœ Scribed by R.C. De Selms; C.J. Fox; R.C. Riordan

Publisher
Elsevier Science
Year
1970
Tongue
French
Weight
102 KB
Volume
11
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

Maahs and Hegenberg in their review of the chemistry of squaric acid (I) state: "Das Slure-dichlorid der QuadratsWure, Dichlor-cyclobutendion, lllsst sich aus Quadratsgure nicht herstellen." (1) Since dichlorocyclobutenedione (II) (2) is an important intermediate in the preparation of mono-and diarylated cyclobutenediones, a reinvestigation of this potential route to its synthesis was undertaken. Indeed I does not react with refluxing thionyl HO\ /O

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