K. Okada et al., ASYMMETRIC-SYNTHESIS OF KEY SYNTHETIC INTERMEDIATES OF ASPIDOSPERMA AND HUNTERIA TYPE INDOLE ALKALOIDS, Heterocycles, 43(8), 1996, pp. 1735-1750
Chiral synthon (6), prepared from alpha,beta-epoxy ketone (4) via 1,2
acyl migration reaction as a key step, was converted to lactones (7) a
nd (8), the key intermediates for Aspidosperma and Hunteria type indol
e alkaloids.