Reduction of aromatic and aliphatic keto esters using sodium borohydride/MeOH at room temperature: a thorough investigation
作者:Juryoung Kim、Kathlia A. De Castro、Minkyung Lim、Hakjune Rhee
DOI:10.1016/j.tet.2010.04.062
日期:2010.6
Reduction of keto esters is a valuable alternative to produce diols. Sodium borohydride/MeOH system at room temperature and short reaction time efficiently reduced α, β, γ, and δ-keto esters having α-keto esters as the most reactive. The ester functionality was reduced effectively due to the presence of oxo group that somehow facilitates the formation of ring intermediate. As expected, the chemoselective
还原酮酯是生产二醇的有价值的替代方法。在室温和短的反应时间下,硼氢化钠/ MeOH系统有效地还原了以α-酮酸酯为最具反应性的α,β,γ和δ-酮酸酯。由于存在以某种方式促进环中间体形成的氧代基团,有效地降低了酯的官能度。如预期的那样,化学选择性实验表明,使用该系统不会降低酯的官能度。这项研究提出了各种酮酯向其相应的二醇的简单,简便且良性的还原过程。