Synthesis of β-Amino Alcohols via the Reduction of Lactamides Derived from Ethyl (2S)-Lactate with Borane-Methyl Sulfide
作者:David Grayson、Frank Lewis、Matthias Eichler
DOI:10.1055/s-0029-1217538
日期:2009.7
Reactions of ethyl (2S)-lactate with various amines affords lactamides that are reduced with borane-methyl sulfide in the presence of boron trifluoride etherate to generate enantiomerically pure β-amino alcohols in good yield.
stability constants of the chelates formed with copper(II) were determined by potentiometry. In all cases, we detected the formation of CuLH−1+, CuLH−2 and CuLH−3− species (L=free ligand). The copper(II) complexes prepared in the solidstate were characterized by IR and UV-visible spectroscopies. The crystal structure of [Cu(pmlH−1)X] (X=Cl, Br) shows that copper(II) is bound to the pyridyl and the deprotonated