Keto-pantoyllactone → D-Pantolactone

Participants

Reaction Conditions

Reaction Steps

0.0025 m-mole of rhodium-1,5-cyclooctadienechloride complex and 0.0065 m-mole of one of the asymmetric ligand compounds indicated in Table 2 were dissolved in 10 ml of THF, and 5 m-mole of ketopantolactone was added thereto. Reduction was carried out at a hydrogen atmosphere of 50 atm. The mixture was stirred at 50° C. for 45 hours. The reaction mixture was concentrated under reduced pressure and distilled under reduced pressure to obtain optically active (R)-(-)pantolactone. The results are shown in Table 2.

Provenance & Evidence