Synthesis of Aminotetrazolyl Esters from Cyanogen Azide with Amino Esters
作者:Young-Hyuk Joo、Soo Gyeong Cho、Eun Mee Goh、Damon A. Parrish、Jean'ne M. Shreeve
DOI:10.1002/ejoc.201201153
日期:2013.2
Several α-amino esters (and their hydrochloride salts) were treated with cyanogenazide at ambient temperature in a mixture of water and acetonitrile to form chiral 5-aminotetrazole derivatives in good yields (47–69 %). The cyanogenazide was prepared from cyanogen bromide and sodium azide. Other functionalized α-amino esters (cysteine, arginine, histidine, and serine) were formed in only trace amounts
几种α-氨基酯(及其盐酸盐)在环境温度下在水和乙腈的混合物中用叠氮化氰处理,以良好的产率(47-69%)形成手性5-氨基四唑衍生物。由溴化氰和叠氮化钠制备叠氮化氰。其他功能化的 α-氨基酯(半胱氨酸、精氨酸、组氨酸和丝氨酸)仅以痕量形成,难以通过柱层析纯化。所有 5-氨基四唑(即 1-8)均通过 IR 光谱、1H、13C 和 15N NMR 光谱以及元素分析进行表征。3-7 的结构是通过单晶 X 射线结构分析获得的。