124093-44-3

Upstream product

• 104-92-7 1-bromo-4-methoxy-benzene 
• 491-37-2 2,3-dihydro-4H-1-benzopyran-4-one 
• 42327-53-7 chrom-3-en-4-ol acetate 

Relevant academic research and scientific papers

Palladium-catalyzed direct arylation of 4-chromanones: Selective synthesis of racemic isoflavanones and 3,3-diaryl-4-chromanones

For the first time, the synthesis of racemic isoflavanones has been achieved in satisfactory to good yields and with high selectivity by Pd-catalyzed direct C-3 arylation of 3-unsubstituted 4-chromanones with aryl bromides with the aid of a Pd2(dba)3/tBu 3PHBF4 catalyst system in the presence of KHCO3 as the base in a dioxane/water mixture (4:1). This catalyst system has also been employed in an unprecedented synthesis of 3,3-diaryl-4-chromanones through direct arylation of 4-chromanones in water.

PALLADIUM CATALYSED ARYLATION OF CHROM-3-EN-4-OL ACETATES VIA THEIR TRIBUTYLTIN ENOLATES

Arylation of in situ generated chrom-3-en-4-ol tributyltin enolates with aryl bromide in the presence of a catalytic amount of PdCl22 gives moderate to good yields of the corresponding isoflavanones.