5-methoxy-pentono-1,4-lactones from (R)-2-hydroxy-5-methoxy-3-pentenoic acid obtained by bioreduction of the 2-oxo acid
作者:David Bonnaffé、Helmut Simon
DOI:10.1016/s0040-4020(01)81186-8
日期:1992.1
Various 5-methoxy-pentono-1,4-lactones and derivatives thereof were synthesised from propargyl alcohol or its methyl ether. The key step was the enantioselective reduction of 2-oxo-5-alkoxy-3-pentenoic acids by resting cells of Proteus vulgaris. The (R) -2-hydroxy-5-methoxy-3-pentenoic acid (ee. > 96%) was further functionalized via epoxidation, or hydroxylation with osmium tetroxide, or bromine addition
从炔丙醇或其甲基醚合成了各种5-甲氧基-戊基-1,4-内酯及其衍生物。关键步骤是寻常变形杆菌的静息细胞对2-氧代-5-烷氧基-3-戊烯酸的对映选择性还原。(R)-2-羟基-5-甲氧基-3-戊烯酸(ee> 96%)通过环氧化或四氧化oxid羟基化或溴化进一步官能化,对中非对映选择性中等至良好,导致5-甲氧基pentono -1,4-内酯系列的(L) -阿糖,(d) -核糖,(L) - L-来苏,和(d) -木糖。描述了一种新的获得2-氧代-3-烯酸的方法,该方法使用了Pd介导的乙烯基锡化合物与草酰氯单酯之间的交叉偶联。