208932-10-9

Basic information

• Product Name: 3-(phenylamino)-2-styryl-4H-[1]benzopyran-4-one
• Synonyms: 3-(phenylamino)-2-styryl-4H-[1]benzopyran-4-one
• CAS NO: 208932-10-9
• Molecular Weight: 339.393
• Mol File: 208932-10-9.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: 3-(phenylamino)-2-styryl-4H-[1]benzopyran-4-one(CAS DataBase Reference)
• NIST Chemistry Reference: 3-(phenylamino)-2-styryl-4H-[1]benzopyran-4-one(208932-10-9)
• EPA Substance Registry System: 3-(phenylamino)-2-styryl-4H-[1]benzopyran-4-one(208932-10-9)

Safety Data

• Hazardous Substances Data: 208932-10-9(Hazardous Substances Data)

Upstream product

• 41420-57-9 (2E,4E)-1-(2-hydroxyphenyl)-5-phenylpenta-2,4-dien-1-one 
• 586-96-9 Nitrosobenzene 

Relevant articles and documents

Synthesis of trans-2,3-dimethoxy-3-(phenylamino)flavanones and related compounds

trans-2,3-Dimethoxy-3-(phenylamino)flavanones (2), a new type of flavanone derivatives, are synthesized from flavanones or 2′-hydroxychalcones in two steps, the first one being a condensation with nitrosobenzenes (Ehrlich-Sachs reaction) and the second an oxidation with (diacetoxyiodo)benzene in methanol. Nitrone formation, an important side reaction of the Ehrlich-Sachs reaction, has also been exploited to synthesize 2 simply by use of an excess of nitrosobenzene in aqueous methanol. Syntheses of several analogues of 2 are also reported.

A convenient synthesis of 1,2-diphenyl-9H-[1]benzopyrano [3,2-b] pyrrol-9-ones utilizing hypervalent iodine reagent

3-(Phenylamino)-2-styryl-4H-[1]benzopyran-4-ones 2, readily obtainable from o-hydroxy-ω-cinnamylidene-acetophenones 1, yield 1,2-diphenyl-9H-[1]benzopyrano-[3,2-b]pyrrol-9-ones 3 on oxidation with [hydroxy(tosyloxy)iodo]benezene in acetonitrile.