Stereochemical Studies. XXXVIII. Asymmetric Synthesis of the Key Compounds for the Synthesis of optically Active Diterpenes. Asymmetric Synthesis of optically Active 1, 2, 3, 4, 5, 6, 7, 8, 8a-Octahydro-8a-methyl-3, 8-naphthalenedione Derivatives with L-Proline Derivatives

Abstract

We attempted the asymmetric synthesis of key compounds for optically active diterpenes and obtained some optically active key compounds (Ib, c). The effects of solvents and reaction temperatures were examined and the results are discussed.