91994-35-3Relevant academic research and scientific papers
Cross-Conjugated and Psaeudo-Cross-Conjugated Mesomeric Betaines. 1. Synthesis and Characterization
Potts, Kevin T.,Murphy, Peter M.,Kuehnling, William R.
, p. 2889 - 2898 (2007/10/02)
Reaction of pyrazoles, 1,2,3-triazoles, and 1,2,4-triazoles with aryl(chlorocarbonyl)ketenes, alkylmalonyl dichlorides, or carbon suboxide results in a series of cross-conjugated mesomeric betaines, characterized by the presence of distinct cationic and anionic segments. 1-Substituted imidazoles, suitably substituted 1,2,4-triazoles, and pyridine with the above reagents give rise to pseudo-cross-conjugated mesomeric betaines which, in addition to charge separation, are characterized by the presence of the 2-oxyallyl cation 1,3-dipole.Alternative syntheses of cross-conjugated mesomeric betaines which allow the introduction of more diverse substituents are also described.
New Heterocyclic Betaines
Potts, Kevin T.,Kuehnling, William R.
, p. 3672 - 3673 (2007/10/02)
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 pyrazolopyrazole system.
