mediated aldol reactions.In addition to this we have also used other solvents (Table 1). The reaction proceeded with moderate results with PEG-400 and THF, while the configuration of the b-hydroxy compound was established as ( R) by comparison of the specific rotation. The series of ligands synthesized were then scanned under the optimized conditions of THF as the solvent for 72 h reaction time using 4-nitro benzaldehyde and acetone. The results are summarized in Table 2.