SYNTHESIS OF AN AXIALLY DISSYMMETRIC BIPHENYLCARBOXYLATE LIGAND, BDME, AND ASYMMETRIC CYCLOPROPANATION OF OLEFINS WITH DIAZOACETATE CATALYZED BY ITS DIRHODIUM(II) COMPLEX
H. Ishitani et K. Achiwa, SYNTHESIS OF AN AXIALLY DISSYMMETRIC BIPHENYLCARBOXYLATE LIGAND, BDME, AND ASYMMETRIC CYCLOPROPANATION OF OLEFINS WITH DIAZOACETATE CATALYZED BY ITS DIRHODIUM(II) COMPLEX, Synlett, (7), 1997, pp. 781
An axially dissymmetric biphenylcarboxylate ligand, BDME (4), has been
newly designed end prepared. The dirhodium(II) complex (1) of (4) pro
ved to be an excellent catalyst in asymmetric cyclopropanation of styr
ene with d-menthyl diazoacetate affording d-menthyl cis-2-phenyl-cyclo
propane-1-carboxylate of 99% de.