Preparation of 2'-13C-L-Histidine Starting from 13C-Thiocyanate: Synthetic Access to Any Site-Directed Stable Isotope Enriched L-Histidine
作者:Sarra Talab、Kamal Taha、Johan Lugtenburg
DOI:10.3390/molecules19011023
日期:——
obtained in a few simple steps starting from thiocyanate and glycine amide (glycin). Subsequent treatment with diethyl phosphorocyanidate and functional group manipulations gives 1-benzyl-5-chloromethyl-imidazolium chloride. This compound is converted under mild O’Donnell conditions into the corresponding L-histidine derivative. After deprotection L-histidine is obtained in good yield and 99% enantiomeric
1-Benzyl-2-(methylthio)-imidazole-5-ketone 从硫氰酸盐和甘氨酸酰胺 (glycin) 开始,通过几个简单的步骤获得。随后用磷酸二乙酯和官能团处理进行处理,得到 1-苄基-5-氯甲基-咪唑鎓氯化物。该化合物在温和的 O'Donnell 条件下转化为相应的 L-组氨酸衍生物。脱保护后,L-组氨酸以良好的收率和 99% 的对映体过量获得。2'-13C-L-组氨酸已通过这种新方案获得,从市售的 13C-硫氰酸酯开始,13C 掺入率高 (99%)。这种合成方案允许获得 L-组氨酸的任何同位素和许多其他生物学上重要的咪唑衍生物。