A novel enantioselective preparation of α-fluoro-β-keto acids
摘要:
A two-step method for the enantioselective preparation of alpha-fluorinated beta-keto acids from 1,3-dioxin-4-ones having l-menthone as the chiral auxiliary at the 2-position is described. The method consists of fluorination of the dioxinones by molecular fluorine and solvolytic cleavage of the acetal function.
Synthesis of optically pure (R)- or (S)-α-fluoro-α-methyl-β-ketoesters
作者:T. Kitazume、T. Kobayashi
DOI:10.1016/s0022-1139(00)81437-2
日期:1986.4
A number of opticallypure (R)- or (S)-α-fluoro- α-methyl-β-ketoesters were prepared by the reaction of the opticallypure acid chlorides made from the corresponding (R)- or (S)-α-fluoro-α-methylmalonic acid monoethyl esters with alkyl (or aryl) cuprates.