A Short Asymmetric Synthesis of 4,4-Disubstituted-γ-butyrolactones from Racemic 2-Methylcyclohexanone in Multigram Scale.--(PINHEIRO, S.; DE FARIAS, F. M. C.; SARAIVA, A. S.; CAMPOS, M. P. A.; Tetrahedron: Asymmetry 9 (1998) 12, 2031-2034; Inst. Quim., Univ. Fed.