Chemoenzymatic synthesis of d-biotin intermediate lactone via lipase-catalyzed desymmetrization of meso diols
作者:Jian-Yong Zheng、Sheng-Fan Wang、Yin-Jun Zhang、Xiang-Xian Ying、Yu-guang Wang、Zhao Wang
DOI:10.1016/j.molcatb.2013.09.014
日期:2013.12
A chemoenzymatic methodology for the asymmetric synthesis of d-biotin intermediate lactone ((3aS, 6aR)-tetrahydro-1,3-dibenzylhexahydro-1H-Furo[3,4-d] imidazole-2,4-dione) 1 has been demonstrated. The key step of the synthetic routes is Lipozyme RM IM catalyzed desymmetrization of meso-diols 3. The highest enantiomeric excess (e.e. > 98%) and yield (>90%) of the product was achieved with Lipozyme RM
d-生物素中间体内酯((3a S,6a R)-四氢-1,3-二苄基六氢-1 H-呋喃[3,4-d]咪唑-2,4-二酮)不对称合成的化学酶学方法1已经证明。合成途径的关键步骤是Lipozyme RM IM催化中二醇3的脱对称。 在35°C下用Lipozyme RM IM在二恶烷/甲苯(1:3,v / v)中获得最高对映体过量(ee > 98%)和收率(> 90%)。此外,Lipozyme RM IM表现出出色的操作稳定性,经过10个循环的反应后,其初始活性保持在80%以上。d-生物素中间体内酯1 随后通过Jones氧化,碱性水解和内酯化获得。