Expeditious Racemic and Enantiodivergent Synthesis of 1-Deoxymannojirimycin and 1,4-Dideoxymannojirimycin
作者:Dina Scarpi、Laura Bartali、Andrea Casini、Ernesto G. Occhiato
DOI:10.1002/ejoc.201200022
日期:2012.5
hydroboration/oxidation, for the synthesis of DMJ. Enantiodivergency was attained by optical resolution before exhaustive functional group deprotection, through the formation of diastereomeric camphanic esters. As the key racemic intermediate esters were easily prepared in a few steps on a large scale, and the final chromatographic separation of the camphanic esters was straightforward, this approach
1-脱氧甘露尻霉素 (DMJ) 和 1,4-双脱氧甘露尻霉素的外消旋和对映发散合成是通过将顺式 4,5-二羟基化 δ-戊内酰胺衍生物转化为相应的烯醇磷酸酯并对其进行 Pd 获得的关键烯酰胺酯中间体实现的-催化甲氧基羰基化。这些中间体的进一步加工包括立体控制催化氢化,用于合成外消旋 1,4-二脱氧甘露尻霉素,以及硼氢化/氧化,用于合成 DMJ。对映发散是通过光学拆分在穷举官能团脱保护之前通过形成非对映樟脑酯获得的。由于关键的外消旋中间体酯很容易通过几个步骤大规模制备,