摘要
以N,N-二甲基乙酰胺为溶剂,环己烷为带水剂,在对甲苯磺酸催化下L-抗坏血酸与直链饱和脂肪醛反应合成了7个L-抗坏血酸缩醛(3a^3g),其结构经1HNMR,IR和MS表征。1H NMR分析表明,3均由两个非对映异构体组成,其比例接近1∶1。根据混合物组分的结构特点,建立了简单易行、费用低廉的分离纯化方法。
Seven L-isoascorbic acid acetals(3a ~ 3g) were synthesized by the reaction of L-ascorbicacid with n-alkyl aldehydes using p-toluene sulfonic acid as a catalyst, dimethyt acetamide as the solvent, and cyclohexane as the water-carrying agent. The structures were characterized by 1H NMR, IRand MS. 1H NMR showed that 3 was a mixt of two diastereomers about 1 : 1. The purification methodwas established by which 3 was separated from the products through a simple and feasible procedure.
出处
《合成化学》
CAS
CSCD
北大核心
2009年第5期624-627,共4页
Chinese Journal of Synthetic Chemistry
基金
江西省普通高校重点实验室科技计划资助项目(赣教技字2007-401)
关键词
L-抗坏血酸
缩醛
对甲苯磺酸
合成
纯化
L-ascorbic acid
aeetal
p-toluene sulfonic acid
synthesis
purification