Deprotonation of the 2-amino- 1,3-dimethylimidazolium salt 5 (obtained through methylation of 2-amino-l-methylimidazole (4)) by KH gives 2-imino-1,3-dimethylimidazoline 6. The trimethylsilylimino compound 14 is formed on the reaction of 6 with chlorotrimethylsilane in the ratio 2:1. Further reaction with chlorotrimethylsilane gives the silylated aminoimidazolium salt 15. The X-ray structures of 5 and 6 are reported.
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Kühn et al. (1995) studied this question.