Studies on Vitamin B<SUB>1</SUB> and Related Compounds.CVII.Synthesis of Hydroxyethylthiamine Homologs
作者:Yoshikazu Oka、Eiko Imamiya、Hiroshi Hirano
DOI:10.1248/cpb.15.448
日期:——
Two types of dihydrothiamine derivatives, IV, VI, VIII, and V, VII, IX, were obtained by the reaction of I, II, and phenylglyoxal derivatives. On treatment with mineral acids both of those underwent hydrolysis in the presence of water, but in non-aqueous solutions thiamine was afforded under room temperature. Treatments of them with weak acids such as phosphoric acid, formic acid and acetic acid effected the conversion to the aryl homologs of hydroxyethylthiamine, XI, XII and XIII.
通过 I、II 和苯乙醛衍生物的反应,得到了两种二氢硫胺衍生物 IV、VI、VIII 和 V、VII、IX。用矿酸处理时,这两种衍生物都会在有水的情况下发生水解,但在非水溶液中,硫胺可在室温下生成。用磷酸、甲酸和乙酸等弱酸对它们进行处理,可将它们转化为羟乙基硫胺的芳基同系物 XI、XII 和 XIII。