作者:Stuart R Crosby、Martin J Hateley、Christine L Willis
DOI:10.1016/s0040-4039(99)02069-9
日期:2000.1
An approach to the enantioselective synthesis of cis- and trans-3-hydroxy-5-methylpiperidin-2-ones from racemic methyl 4-methyl-5-nitro-2-oxopentanonate 8 is described via the first example of a lactate dehydrogenase catalysed combined kinetic resolution and reduction of a 2-oxo acid. In an alternative approach, stereoselective conjugate addition of nitromethane to a crotonyl camphorsultam gave access
通过乳酸脱氢酶催化结合的第一个实例,描述了由外消旋的4-甲基-5-硝基-2-氧代戊烷酸酯8由对映体选择性合成顺式和反式-3-羟基-5-甲基哌啶-2-酮的方法。动力学拆分和还原2-氧代酸。在另一种方法中,将硝基甲烷立体选择性共轭加成到巴豆酰基樟脑中,可得到对映体纯的2-氧代酯(S)-8和(R)-8,它们可依次转化为3-羟基-5-甲基δ-内酰胺。