Synthesis of 1,3 distributed imidazolium salts

Details Synthesis of 1,3 distributed imidazolium salts Synthesis of 1,3 distributed imidazolium salts

2006-09-19

2006-09-19

Saeed, Kamal A. (Department: 1626)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C548S300100

Reexamination Certificate

active

07109348

ABSTRACT:
Imidazolium salts are the immediate precursors to N-heterocyclic carbenes (NHC) yet a simple, general synthetic route to a wide variety of imidazolium salts is not yet available. Such a straightforward route is described for two specific members of this family of ligand precursor: 1,3-Bis(2,4,6-trimethylphenyl)imidazolium chloride (IMes.HCl) and 1,3-Bis(2,6-diispropylphenyl)imidazolium chloride (IPr.HCl). The procedure appears general and similar protocols can be used to isolate various imidazolium salts.

REFERENCES:
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patent: 5182405 (1993-01-01), Arduengo, III
patent: 6316380 (2001-11-01), Nolan et al.
Arduengo et al., Tetrahedron, 1999, 55:14523-14534.
Jafarpour et al., J. of Organometallic Chemistry, 2000, 606:49-54.

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