Journal of Organic Chemistry p. 3672 - 3673 (1984)
Update date:2022-08-04
Topics:
Potts, Kevin T.
Kuehnling, William R.
Several new types of cross-conjugated, heterocyclic betaines have been prepared from (chlorocarbonyl)phenylketene and e.g., 1-methylimidazole and pyridine; in an alternative synthetic approach, reaction of 1-(substituted acetyl)-3,5-dimethylpyrazole with NaH and the electrophilic reagents phosgene, thiophosgene, and other activated geminal dichlorides allowed variation of the exocyclic substituents in new examples of the pyrazolo<1,2-a>pyrazole system.
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