Approaches to the synthesis of 5-benzylidene-2-imidazolin-4-ones was written by Prager, Rolf H.;Tsopelas, Chris. And the article was included in Australian Journal of Chemistry in 1990.Product Details of 15813-09-9 This article mentions the following:
Aromatic aldehydes, but not ketones, condensed with glycocyamidine to give the benzylideneamines. α-Alkylbenzylideneglycocyamidines were made from glycidic esters by reaction with guanidine, followed by cyclization with Ac2O. A number of mono- and diacetylated derivatives of 6,7-dihydropyrrolo[2,3-c]azepine-4,8(1H,5H)-dione have been prepared, but failed to undergo the Darzens reaction. Bromo- and iodo-2-arylazoimidazoles, protected on N by the methoxyethoxymethyl group, failed to undergo clean lithiation. In the experiment, the researchers used many compounds, for example, 4,5-Diiodo-1H-imidazole (cas: 15813-09-9Product Details of 15813-09-9).
4,5-Diiodo-1H-imidazole (cas: 15813-09-9) belongs to iodide derivatives. Organic iodides can be alkyl, alkenyl, or alkynyl, and all of them are very reactive toward with many kinds of nucleophiles. Alkyl iodides react at a faster rate than alkyl fluorides due to the weak C-I bond.Product Details of 15813-09-9
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com