Imidazolium cations and processes for their preparation

Details Imidazolium cations and processes for their preparation Imidazolium cations and processes for their preparation

1998-07-29

1999-10-19

Marschel, Ardin H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

5483001, 5483017, 540 1, 540100, 536 221, 536 2532, C07D23354, C07D23300, C07D34500, C07H 2100

Patent

active

059691506

ABSTRACT:
The present invention relates to novel imidazolium compounds and improved processes for the preparation of imidazolium cations with one or more imidazolium moieties optionally substituted with the same or different substituents, which are prepared from a reactant with at least one N--C--C--N group, by reacting with with an N-substituted or N,N-disubstituted thioformamide, formamide acetal or thioformamide acetal, in the presence of a halogenating agent. Examples of suitable halogenating agents include but are not limited to thionyl chloride, phosgene, and phosgene derivatives. Reactants containing more than one additional N--C--C--N group may also be used to prepare compounds with two or more imidazolium groups, by the procedures of the present invention. Certain compounds of the invention prepared from reactants with multiple N--C--C--N groups may have both unreacted N--C--C--N moieties and substituted imidazolium groups.

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