71840-35-2

Basic information

• Product Name: (2R*,2’S*)-2,2’-diphenyl-[2,2’-bichromane]-4,4’-dione
• Synonyms: (2R*,2’S*)-2,2’-diphenyl-[2,2’-bichromane]-4,4’-dione
• CAS NO: 71840-35-2
• Molecular Weight: 446.502
• Mol File: 71840-35-2.mol
• Article Data: 5

Chemical Properties

• CAS DataBase Reference: (2R*,2’S*)-2,2’-diphenyl-[2,2’-bichromane]-4,4’-dione(CAS DataBase Reference)
• NIST Chemistry Reference: (2R*,2’S*)-2,2’-diphenyl-[2,2’-bichromane]-4,4’-dione(71840-35-2)
• EPA Substance Registry System: (2R*,2’S*)-2,2’-diphenyl-[2,2’-bichromane]-4,4’-dione(71840-35-2)

Safety Data

• Hazardous Substances Data: 71840-35-2(Hazardous Substances Data)

Upstream product

• 525-82-6 FLAVONE 
• 888-12-0 (E)-2'-hydroxy-chalcone 
• 121-69-7 N,N-dimethyl-aniline 

Relevant articles and documents

Photoinduced electron transfer reactions of flavone with amines -the syntheses of 2,4′- And 2,2′-biflavanoids

Photoinduced electron transfer reactions of flavone (FL) with triethylamine (TEA) in benzene or in acetonitrile gave meso- 2,2′-biflavone 1 and (±)-2,2′-biflavone 2, as well as 2,4′-biflavanoid 3 in good total yield (77% in acetonitrile and 94% in benzene

Photochemical synthesis of 2,2′-biflavanones from flavone

Photolysis of flavone (4) with the electron-donating amines including triethylamine or 2-(N,N-dimethylamino)ethanol in acetonitrile, benzene or methylene dichloride can easily afford two hydrodimers of 2,27prime;-bi- flavanone(racemate) (5a) and 2,2′-biflavanone(meso) (5b) and one reductive product of flavanone (6). Their yields were dependent on the molar ratios of substrate to amine, the kinds of amines, the solvents used and the irradiation sources. Higher yields were afforded 2,27prime;-biflavanone(racemate) (5a), 2,27prime;-biflavanone(meso) (5b) and flavanone (6) (30.0%, 20.9% and 15.8%, respectively) in the reaction condition of 1/2 molar ratio of flavone (4) to triethylamine in acetontrile with fourteen hours of irradiation.

Reaktionen mit Radikalanionen, IV. Synthese von Mono- und Diketonen aus Carboxyl- und α,β-ungesaettigten Carbonyl-Verbindungen

1,2-Diketones of the benzil type were obtained in the reaction of aromatic carboxylic compounds with lithium naphthalenide.The scope of this reaction was investigated. α,β-Unsaturated ketones yielded hydrodimerisation, hydrogenation and hydroxylation products.