Bicyclic imidazoles for modular synthesis of chiral imidazolium salts.


The preparation of new chiral bicyclic imidazoles 5 and their transformation into imidazolium salts 6 and 7 are reported. The utility of the salts as precursors for chiral N-heterocyclic carbenes was demonstrated by the synthesis of C-N-C pincer Ni-complex 13h, the structure of which was characterized by single-crystal X-ray analysis. 
DOI: 10.1021/ol1003737


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