Studies towards a greener diazo transfer methodology

摘要

A very mild, efficient and green method has been developed for diazo transfer to a range of β-ketoesters using polystyrene-supported benzenesulfonyl azide, water as solvent and a catalytic amount of base. This methodology eliminates the need for a standard work up and purification which is usually required to remove the sulfonamide by-product from the reaction.