Desulfonylation reactions: Recent developments

Arylation with organolead and organobismuth reagents

Arylation of A- ring substituted and unsubstituted 3-allyloxycarbonylchroman-4-ones with aryllead (IV) triacetates followed by selective catalytic deallyloxycarbonylation affords isoflavanones or isoflavones in high overall yields. The highest yield in the arylation step was observed in the reaction of 5,7-dimethoxychroman-4-one with the more hindered 2,4,6-trimethoxyphenyllead triacetate.

Organolead-mediated arylation of allyl β-ketoesters: a selective synthesis of isoflavanones and isoflavones

Synthesis of isoflavones

An efficient method for the N-arylation of pyridin-2(1H)-ones and the related heteroaromatic lactams has been established via ligand-coupling reactions using tri- or tetra-aryl organobismuth(V) rea...

N-Arylation of Pyridin-2(1H)-ones with Pentavalent Organobismuth Reagents under Copper-Free Conditions

Phenylation of 3-phenylsulfonlylchroman-4-ones using Ph3BiCO3leading to the synthesis of isoflavanones and isoflavones is reported.

K. C. Santhosh

Papers

Ligand coupling route to isoflavanones and isoflavones

Ligand Coupling Route to Isoflavanones and Isoflavones.