73557-85-4

Upstream product

• 71115-30-5 2-Methyl-3-(4-methylphenylamino)-1,3-diphenyl-2-propenimine 
• 103-72-0 phenyl isothiocyanate 
• 103-71-9 phenyl isocyanate 
• 100046-24-0 5-Methyl-2,2,4,6-tetraphenyl-1-p-tolyl-1,2-dihydro-[1,3,2]diazasiline 

Relevant academic research and scientific papers

A Simple Synthesis of Substituted 2-Imino-1,2-dihydropyrimidines From 1-Azabutadienes via Diazasilines

1,2-Dihydro-1,3,2-diazasilines, formed on reaction of 4-amino-1-azabutadienes (3-amino-2-propenylideneamines) with dichlorodiphenyl- or dichlorodimethylsilane, react with aliphatic and aromatic isocyanates to give high yields of substituted 2-imino-1,2-di

Reactivity of 1,3-Diimines. Reaction with Heterocumulenes

1,3-Diimines 1 react with isocyanates and isothiocyanates 2 to give, as the major products, different 2-oxo- and 2-thiopyrimidines 9 and 10.The formation of these products can be explained by two different reaction paths that involve an addition reaction followed by an electrocyclic ring closure.The nature of the group R1 in 1 plays a basic role in the result of the process.Open-chain intermediate products 3 have been isolated and characterized for the first time in a cyclization reaction with diimines 1.