Synthetic Studies ond-Biotin, Part 8:[1] An Efficient Chemoenzymatic Approach to the Asymmetric Total Synthesis ofd-Biotinvia a Polymer-Supported PLE-Mediated Desymmetrization ofmeso-Symmetic Dicarboxylic Esters
作者:Fen-Er Chen、Xu-Xiang Chen、Hui-Fang Dai、Yun-Yan Kuang、Bin Xie、Jian-Feng Zhao
DOI:10.1002/adsc.200404311
日期:2005.3
A practical chemoenzymatic method for the asymmetric total synthesis of d-biotin (1) starting from the commercially available cis-1,3-dibenzyl-2-imidazolidone-4,5-dicarboxylic acid (2) has been developed. The key step of the synthesis is the highly enantioselective hydrolysis of meso-dicarboxylic esters by a polymer-supported pig liver esterase and introduction of a formyl group at the C-4 position
已经开发了一种实用的化学酶促方法,用于从市售的顺式1,3,3-二苄基-2-咪唑啉酮-4,5-二羧酸(2)开始不对称全合成d-生物素(1)。合成的关键步骤是通过聚合物支持的猪肝酯酶对内-二羧酸酯进行高度对映选择性水解,并通过格氏反应在4的C-4位引入甲酰基。可以通过简单的过滤从反应混合物中定量回收聚合物负载的PLE,并在不显着降低活性的情况下重复使用。