139449-29-9

Basic information

• Product Name: 4H-1-Benzopyran-4-one, 2,3-dihydro-3-methyl-3-(phenylsulfonyl)-
• CAS NO: 139449-29-9
• Molecular Formula: C16H14O4S
• Molecular Weight: 302.351
• Mol File: 139449-29-9.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: 4H-1-Benzopyran-4-one, 2,3-dihydro-3-methyl-3-(phenylsulfonyl)-(CAS DataBase Reference)
• NIST Chemistry Reference: 4H-1-Benzopyran-4-one, 2,3-dihydro-3-methyl-3-(phenylsulfonyl)-(139449-29-9)
• EPA Substance Registry System: 4H-1-Benzopyran-4-one, 2,3-dihydro-3-methyl-3-(phenylsulfonyl)-(139449-29-9)

Safety Data

• Hazardous Substances Data: 139449-29-9(Hazardous Substances Data)

Upstream product

• 102540-14-7 3-bromo-3-methyl-chroman-4-one 
• 873-55-2 sodium benzenesulfonate 
• 139449-23-3 3-(benzenesulfonyl)chroman-4-one 
• 74-88-4 methyl iodide 

Downstream Products

• 16982-86-8 3-methyl-chroman-4-one 
• 85-90-5 3-methylchromone 

Relevant articles and documents

Metal-free desulfonylation reaction through visible-light photoredox catalysis

The desulfonylation of β-arylketosulfones has been achieved in good to excellent yields by using 3-W blue LEDs light, 1 mol-% organic dye eosin Y bis(tetrabutylammonium salt) as photocatalyst, and diisopropylethylamine as reducing agent. Mechanistic studies demonstrate that oxidative quenching of the excited eosin Y by β-arylketosulfones plays a crucial role in the present photoredox catalytic cycle. Reductive desulfonylation is essential to enable to use of a sulfone as an auxiliary group. For reductive removal of sulfones, highly aggressive metal-containing reducing agents and harsh reaction conditions are often employed. In this paper, metal-free desulfonylation of β-arylketosulfones can be achieved efficiently at room temperature under visible-light irradiation.