A. Imura et al., ENANTIOSELECTIVE SYNTHESIS OF 20(S)-CAMPTOTHECIN USING AN ENZYME-CATALYZED RESOLUTION, Tetrahedron : asymmetry, 9(13), 1998, pp. 2285-2291
The important key intermediate of a 20(S)-camptothecin synthesis was p
repared enantioselectively using an enzyme-catalyzed resolution. A com
mercially available papain was found to exhibit the highest enantiosel
ectivity with moderate activity, and the (S)-enantiomer of 99% ee was
obtained as the remaining substrate. (C) 1998 Elsevier Science Ltd. Al
l rights reserved.