30758-46-4

Upstream product

• 5707-04-0 Phenylselenyl chloride 
• 57039-70-0 4,4-Dimethyl-6-formylcyclohex-2-en-1-one 

Downstream Products

• 139287-48-2 3-(3',4',5'-trimethoxyphenyl)-5,5-dimethyl-3,4,4a,5-tetrahydro-8H-2-benzopyran-8-one 
• 136830-63-2 3,7,7-Trimethyl-4-oxo-2,4,7,7a-tetrahydrobenzofuran 
• 138433-40-6 2-Formyl-4,4-dimethylcyclohexa-2,5-dienone dipropargyl acetal 
• 182412-93-7 2-[(3,3-Dimethyl-6-oxo-cyclohexa-1,4-dienyl)-hydroxy-methyl]-acrylic acid methyl ester 
• 193561-03-4 methyl cis-β-(5,5-dimethyl-2-oxocyclohexa-3,6-dien-1-yl)acrylate 
• 139287-47-1 3-(3',4'-dimethoxyphenyl)-5,5-dimethyl-3,4,4a,5-tetrahydro-8H-2-benzopyran-8-one 
• 139287-46-0 3-(4'-methoxyphenyl)-5,5-dimethyl-3,4,4a,5-tetrahydro-8H-2-benzopyran-8-one 

Relevant academic research and scientific papers

An efficient method for the synthesis of β-dicarbonyl enones using polymer-supported N, N-diethylbenzeneselenenamide

A novel polystyrene-supported N, N-diethylbenzeneselenenamide reagent has been prepared. Reaction of the resin with β-formylcycloanones and subsequent oxidative deselenation afforded β-dicarbonyl enones in good yields and high purities.

A Simple Method for the Efficient Synthesis of Unsaturated β-Dicarbonyl Compounds

β-Dicarbonyl compounds which are substantially enolized can be readily converted to their corresponding unsaturated derivative by (a) selenation using a 1:1 complex of phenylselenenyl chloride/pyridine and (b) in situ oxidation with 30percent H2O2 (after removal of the pyridine).The isolated yields of unsaturated β-dicarbonyl compounds obtained in this way are typically between 80percent and 100percent.If the selenation step (step a) is carried out in the presence of excess reagent, a slow ''nonoxidative'' elimination occurs.Synthetic and mechanistic details of this ''nonoxidative''process are discussed.