Superbase
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High Quality Content by WIKIPEDIA articles! Organic superbases are almost always neutral, nitrogen-containing species. Despite enormous proton affinity, organosuperbases are prized for their heightened reactivity tempered by low nucleophilicity and relatively mild conditions of use. Increasingly important in organic synthesis, these include the phosphazenes, amidines and guanidines. Other organic compounds also meet the physicochemical or structural definitions of 'superbase'. Proton chelators like the aromatic proton sponges and the bispidines are also superbases. Multicyclic polyamines, like...
High Quality Content by WIKIPEDIA articles! Organic superbases are almost always neutral, nitrogen-containing species. Despite enormous proton affinity, organosuperbases are prized for their heightened reactivity tempered by low nucleophilicity and relatively mild conditions of use. Increasingly important in organic synthesis, these include the phosphazenes, amidines and guanidines. Other organic compounds also meet the physicochemical or structural definitions of 'superbase'. Proton chelators like the aromatic proton sponges and the bispidines are also superbases. Multicyclic polyamines, like DABCO might also be loosely included in this category. Organometallic compounds of reactive metals are often superbases; including organolithium and organomagnesium (Grignard reagent) compounds. Another type of organic superbase has a reactive metal exchanged for a hydrogen on a heteroatom, such as oxygen (unstabilized alkoxides) or nitrogen (metal amides such as lithium diisopropylamide).
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