Racemisation of (1R, 6S)- 8-benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0]nonane using Halogenated Solvent in Basic Medium

A simple, highly rapid, efficient and eco friendly process for Racemisation of (1R, 6S)- 8benzyl-7,9-dioxo-2,8-diazabicyclo[4.3.0] nonane in various halogenated solvents has been carried out as a base catalysed reaction to afford racemic mixture in excellent yields (80-95%) at temperature of or below 40 o C. The base catalysed racemisation in halogenated solvent has an advantage of simple workup procedure, and use of less volume of halogenated solvent irrespective of type of solvent used in the reaction system.