作者:Fen-Er Chen、Jian-Feng Zhao、Fang-Jun Xiong、Bin Xie、Ping Zhang
DOI:10.1016/j.carres.2007.06.029
日期:2007.11
An efficient and reproducible process for the synthesis of methyl 2,3,4,5-tetradeoxy-7,8-O-isopropylidene-D-arabino-nanonate (2), a key intermediate in the total synthesis of (+)-biotin (1), starting from readily available D-mannose is described. The crucial part of this synthesis was the development of a practical route to a novel O-benzyl protected unsaturated ester methyl (benzyl 5,6,7,8-tetradeoxy-2
一种高效且可重现的合成2,3,4,5-四脱氧-7,8-O-异亚丙基-D-阿拉伯糖基壬酸甲酯(2)的合成方法,这是(+)-生物素全合成的关键中间体(1)从容易获得的D-甘露糖开始描述。该合成的关键部分是开发一种实用的方法,以开发一种新型的O-苄基保护的不饱和酯甲基(苄基5,6,7,8-四脱氧-2,3-O-异亚丙基-alpha-D-lyxo-nona -5,7-二呋喃呋喃糖苷)(7),可一步制备羟基酯甲基5,6,7,8-四脱氧-2,3-O-异亚丙基-α-D-lyxo-纳米呋喃糖酸酯(8)通过钯在碳催化剂上的催化脱苄基和加氢反应。该步骤无需色谱纯化,因此非常适合工业规模的合成制备。