75250-37-2

Basic information

• Product Name: 1H-2-Benzopyran-1-one, 3,4-dihydro-3-phenyl-4-(phenylseleno)-, trans-
• CAS NO: 75250-37-2
• Molecular Formula: C21H16O2Se
• Molecular Weight: 379.317
• Mol File: 75250-37-2.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: 1H-2-Benzopyran-1-one, 3,4-dihydro-3-phenyl-4-(phenylseleno)-, trans-(CAS DataBase Reference)
• NIST Chemistry Reference: 1H-2-Benzopyran-1-one, 3,4-dihydro-3-phenyl-4-(phenylseleno)-, trans-(75250-37-2)
• EPA Substance Registry System: 1H-2-Benzopyran-1-one, 3,4-dihydro-3-phenyl-4-(phenylseleno)-, trans-(75250-37-2)

Safety Data

• Hazardous Substances Data: 75250-37-2(Hazardous Substances Data)

Upstream product

• 5707-04-0 Phenylselenyl chloride 
• 66374-10-5 (Z)-2-(2-phenylethenyl)benzoic acid 
• 1666-13-3 diphenyl diselenide 
• 5079-90-3 (E)-2-styrylbenzoic acid 
• 87717-18-8 Ethyl 2-(2-phenylethenyl)benzoate 
• 6091-64-1 2-bromobenzoic acid ethyl ester 
• 100-42-5 styrene 
• 68395-72-2 N-phenylselenenyl succinimide 
• 60901-21-5 o-styrylbenzoic acid 

Downstream Products

• 2674-44-4 3-phenyl-isochroman-1-one 
• 4809-08-9 3-phenyl-isocoumarin 

Relevant articles and documents

Diselenide- and disulfide-mediated synthesis of isocoumarins

Cyclizations of stilbenecarboxylic acids to the corresponding isocoumarin derivatives using diselenide or disulfide reagents have been developed. By employing bis(triflouroacetoxy)iodobenzene as oxidant for the 6-endo-trig cyclizations a variety of dihydroisocoumarins have been prepared in good yields. This method is capable of forming isocoumarins and dihydroisocoumarin derivatives by a cyclization-elimination route.

Cyclofunctionalisation of unsaturated acids with benzeneselenenyl chloride. Kinetic and thermodynamic aspects of the rules for ring closure

Experimental procedures are described for the synthetically useful reaction by which olefinic acids are converted into lactones carrying a benzeneseleno-group. Data are presented to define some of the mechanistic details of this type of cyclofunctionalisation and kinetic and thermodynamic factors relevant to the Rules for Ring Closure are discussed. A nomenclature is introduced for a treatment of ring-fusion stereochemistry.