69275-54-3

Upstream product

• 67103-91-7 3,4-diphenyl-2-furoyl-azide 
• 67-63-0 isopropyl alcohol 

Downstream Products

• 4808-48-4 2,3-diphenylmaleic anhydride 
• 2510-53-4 Phenanthrene-9,10-dicarboxylic anhydride 
• 76394-28-0 N-carbethoxy-phenanthrene-9,10-dicarboximide 
• 76394-42-8 N-carboisopropyloxy-3-hydroxyphenantro<9,10-c>pyrrolin-1-one 

Relevant academic research and scientific papers

Ring Transformation of 3,4-Diphenyl-2-furylcarbamoyl Compounds to N-Substituted 3,4-Diphenyl-5-hydroxy-3-pyrrolin-2-ones

3,4-Diphenyl-2-furylcarbamoyls (IIIa - e) react with oxygen in benzene at room temperature and in the abscence of catalysts or bases to give 3,4-diphenyl-5-hydroxy-3-pyrrolin-2-ones (Va - e) as main products.Under the same conditions, treatment of 3,4-diphenyl-2-furyl isocyanate (II) with an excess of various amines resulted in a clean autoxidation reaction to give Ve - h and diphenylmaleimides (XIIa - d) in a ratio of about 1:1. 3-Hydroxyphenantropyrrolin-1-ones (XIIIa - e) were prepared by the photocyclization of Va - e.