Electron-transfer reduction of 1-deoxy-1-nitroalditols to glycamines with ferrous hydroxide
作者:Božena Pribulová、Mária Petrušová、Hana Smrtičová、Ladislav Petruš
DOI:10.1016/j.carres.2012.10.004
日期:2012.12
prepared ferrous hydroxide at ambient temperature provides the corresponding glycamines that were isolated in 81-94% yields as salts with TFA. Under such modified reaction conditions, the retro-Henry reaction of the starting compounds is significantly suppressed due to the amphoteric character of the reducing agent in water. Lower, 58-75% yields were obtained by the classical process with ferrous sulfate
在环境温度下用新鲜制备的氢氧化亚铁处理八种不同的1-脱氧-1-硝基醛糖醇,得到相应的甘氨酸,其与TFA的盐分离率为81-94%。在这种改进的反应条件下,由于还原剂在水中的两性特性,起始化合物的逆亨利反应被显着抑制。用硫酸亚铁在氨水中,通过经典方法得到的产率较低,为58-75%,这是通过用碳酸钡不可逆地捕获硫酸根离子而采用改进的提纯产物氨基乙酸的方法。