Pilot-Scale Synthesis and Purification of α-Asaronol for Antiepileptic Drug Development
作者:Qun-Zheng Zhang、Zhi-Qiang Ouyang、Yu-Hao Zhou、Si-Chang Wang、Cong-Yu Ke、Ya-Jun Bai、Xun-Li Zhang、Xiao-Hui Zheng
DOI:10.1021/acs.oprd.3c00076
日期:2023.7.21
impurities in the synthesis process, namely, (2,4,5-trimethoxyphenyl)methanol, 3-(2,4,5-trimethoxyphenyl)propan-1-ol, 5,5′-((1E,1′E)-oxybis(prop-1-ene-3,1-diyl)) bis(1,2,4-trimethoxybenzene), and diethyl 2-(2,4,5-trimethoxybenzyl)malonate. By adapting a commonly used recrystallization process through optimization, a large-scale purification method was developed for the purification of α-asaronol, achieving
开发了一种简单高效的中试工艺来合成和纯化 α-细辛醇(( E )-3'-羟基细辛醚)。以2,4,5-三甲氧基苯甲醛1和丙二酸氢乙酯2为原料,通过Knoevenagel缩合反应生成中间体(E)-3-(2,4,5-三甲氧基苯基)丙烯酸乙酯3(收率93.3%),然后用二异丁基铝还原,一批生产4.29kgα-细辛醇4(纯度99.92 % )氢化物生成α-细辛醇4收率89.2%。液相色谱-质谱(LC-MS)和核磁共振(NMR)光谱分析显示合成过程中存在四种主要杂质,即(2,4,5-三甲氧基苯基)甲醇、3-(2,4,5-三甲氧基苯基)丙-1-醇、5,5′-((1 E ,1′ E )-氧双(丙-1-烯-3,1-二基))双(1,2,4-三甲氧基苯)和2-(2,4,5-三甲氧基苄基)丙二酸二乙酯。通过优化采用常用的重结晶工艺,开发了α-细辛醇的大规模纯化方法,重结晶纯度达到99.92%。该中试研究为候选药物