Silane Reduction of 5-Hydroxy-6-methyl-pyridine-3,4-dicarboxylic Acid Diethyl Ester: Synthesis of Vitamin B6
作者:Yves Dumond、Andrew Gum
DOI:10.3390/81200873
日期:——
Alternative methods for the synthesis of pyridoxine have been investigated. The key intermediate, 5-hydroxy-6-methyl-pyridine-3,4-dicarboxylic acid diethyl ester (5), was reduced with either a silane monomer (MeSiH(OEt)2) or a polysiloxane (polymethylhydrosiloxane, PMHS) to afford crude pyridoxine. An isolation technique utilizing a commercially available resin was devised, affording the desired product, vitamin B6, in an overall yield of 38-54 % and a purity of 76%.
研究了合成吡哆醇的替代方法。关键中间体,5-羟基-6-甲基-吡啶-3,4-二羧酸二乙酯(5),分别采用硅烷单体(MeSiH(OEt)₂)或聚硅氧烷(聚甲基氢硅氧烷,PMHS)还原,得到粗制吡哆醇。设计了一种利用市售树脂的分离技术,最终获得了目标产物维生素B6,总产率为38-54%,纯度为76%。