72923-22-9

Upstream product

• 75-15-0 carbon disulfide 
• 138356-04-4 3-imino-1,3,N-triphenyl-2-methylprop-1-enylamine 
• 71115-30-5 2-Methyl-3-(4-methylphenylamino)-1,3-diphenyl-2-propenimine 
• 103-72-0 phenyl isothiocyanate 

Relevant academic research and scientific papers

Novel Synthesis of Di-imines by the Transformation of 1-Aryl-4,6-disubstituted Pyrimidin-2(1H)-ones

The di-imines (4), which are versatile starting materials for the synthesis of heterocycles, are obtained in fair yields when the 1-aryl-4,6-disubstituted pyrimidin-2(1H)-ones (3) are treated with alkoxide, both photochemically and thermally.The di-imines (4) thus obtained, when treated with disulphide, give the 1,3-thiazine-2-thiones (8) and/or the 1-arylpyrimidine-2(1H)-thiones (9).

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.