Simple synthesis of optically active 2-fluoropropanoic acid and analogs of high enantiomeric purity
作者:Elke Fritz-Langhals、Gabi Schu¨tz
DOI:10.1016/s0040-4039(00)60570-1
日期:1993.1
A very simple synthesis of opticallyactive 2-fluoropropanoic acid 1 (R=CH3, R′=H) and analogs of high enantiomeric purity was developed using the sulfonates 2 of the corresponding opticallyactive 2-hydroxycar☐ylic esters and potassium fluoride in formamide. Thus methyl (R)-2-fluoropropanoate (1, R=CH3, R′=CH3) was prepared in an optical purity of 96% from the mesylate of methyl (S)-lactate (ee 97
Alkali metal fluorides as efficient fluorinating agents. Enantiocontroued synthesis of 2-fluoroalkyl carboxylates and 1-fluoroalkyl benzenes
作者:Eike Fritz-Langhals
DOI:10.1016/0957-4166(94)80048-0
日期:1994.6
Potassium fluoride and cesium fluoride m formamide, N-methylformamide, or acetamide are efficient fluorinatingagents. They can be used for the enantiocontrolled synthesis of 2-fluorocarboxylic acids 1a and 1-fluoroalkyl benzenes 1b from the corresponding sulfonates which are easily available in high enantiomeric purity. The scope and limitation of the synthetic method is discussed.