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.
作者:Dmitry I. Bugaenko、Alexey A. Volkov、Alexander V. Karchava
DOI:10.1021/acs.joc.3c00734
日期:2023.7.21
Most existing methods for the synthesis of alkylaryl thioethers require the use of mercaptans as the starting materials, which comes with practical limitations. Reactions of diaryliodonium salts with xanthate salts, easily prepared from the corresponding alcohols and CS2, under the developed conditions represent an operationally simple, thiol-free method for the synthesis of these valuable compounds
大多数现有的烷基芳基硫醚的合成方法需要使用硫醇作为起始原料,这存在实际限制。二芳基碘鎓盐与黄原盐(很容易由相应的醇和CS 2制备)在开发的条件下的反应代表了一种操作简单、无硫醇的合成这些有价值的化合物的方法。该方案具有高官能团耐受性,可应用于后期 C-H 官能化和 CD 3 S 基团的引入。