4198-01-0

Upstream product

• 30779-85-2 3-benzyl-4H-1-benzopyran-4-one 

Downstream Products

• 491-38-3 1-benzopyran-4(4H)-one 
• 55168-26-8 trans-1-(2-Hydroxybenzoyl)-2-(4-oxo-4H-<1>benzopyran-3-yl)-ethylen 
• 1262885-04-0 C₂₈H₂₁NO₂ 
• 1262885-06-2 C₂₈H₂₁NO₂ 
• 1262884-64-9 (Z)-2-phenyl-3-((phenylamino)methylene)chroman-4-one 

Relevant academic research and scientific papers

Reactivity of α-arylidene benzoheteracyclanone dibromides toward azide ion: An effective approach to 3-(α-substituted-benzyl)chromones and -1-thiochromones

Treatment of dibromides of 3-arylidenechromanones and -1-thiochromanones with sodium azide resulted in the formation of 3-(α-azidobenzyl)chromones and -1-thiochromones whereas dibromides having no antiperiplanar vicinal hydrogen in the ring such as flavanone, 1-thioflavanone and benzosuberone derivatives afforded only the parent enones by bromine elimination. Evidence supported the intermediacy of 3-(α-bromobenzyl)chromones and -1-thiochromones in this reaction. These postulated intermediates were prepared in an independent way and transformed into azides in high yield.