153450-02-3

Upstream product

• 19725-49-6 4'-nitroflavone 
• 84634-64-0 1-(2-hydroxy-phenyl)-3-(4-nitro-phenyl)-propane-1,3-dione 
• 144406-94-0 C₁₅H₁₁NO₅ 

Downstream Products

• 1373355-49-7 C₂₃H₁₅NO₄ 
• 1373355-53-3 3-nitro-5-phenyl-7H-benzo[c]xanthen-7-one 
• 1373355-58-8 6-hydroxy-3-nitro-5-phenyl-7H-benzo[c]xanthen-7-one 
• 153450-04-5 2-(4-Amino-phenyl)-3-bromo-chromen-4-one 

Relevant academic research and scientific papers

A new synthesis of 5-arylbenzo[c]xanthones from photoinduced electrocyclisation and oxidation of (E)-3-styrylflavones

A new synthetic route to 5-arylbenzo[c]xanthones is -established. This was accomplished by use the Heck reaction of 3-bromoflavones with styrene derivatives, leading to (E)-3-styrylflavones with total diastereoselectivity. This transformation was greatly improved under microwave irradiation. The one-pot, photoinduced electrocyclisation of (E)-3-styrylflavones and further in situ oxidation of the cycloadduct leads to 5-arylbenzo[c]xan-thones. Georg Thieme Verlag Stuttgart · New York.

Syntheses of some New Heterocycles from 4'-Aminochromones. Part I

Syntheses of some new pyrazoles from hitherto unknown 4'-aminochromones have been described.Their structures have been confirmed on the basis of elemental analysis and spectral data.