✦ LIBER ✦

Structure of the alleged diels-alder adduct from 2,3-dimethyl-quinoxaline and maleic anhydride

✍ Scribed by Edward C. Taylor; E. Smakula Hand

Publisher: Elsevier Science
Year: 1962
Tongue: French
Weight: 303 KB
Volume: 3
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)70590-9

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✦ Synopsis

Frequentreferencelamade lnthe lIteraturea to the Mele-Alder reaatlon of 2,+kuethylquinoxallne (purportedly reacting in itr tautomeric ram I) vlth maleic anhydride to give the "edduct" 11s or IIb. This cm-lr re-ported= to ha= the elementary analyale C14HLpllnOe, not to mlt below 300°, to be yellow, rublimable, unrasctlre towswb dluomethane, ud to be I Ifa IIb recrystalUzable from acetic acid, eoluble In aqueoue loo/o rodlu hydroxide, and recoverable after refluxing for one hour In aqueoue ZOO/o rodlue hydroxide. Since the atability of the coapouud seemed at variance vlth itr aeeigned 1 Thie vork wa8 rtrpported by a grant (CY-2551) to

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