Optically active 4-ethyl-3, 5-dihydroxy-2-methylpentyl derivatives, the iodide (4), phenyl sulfone (5), and phenyl sulfoxide (6), which are chiral synthons for an essential structural unit of polyether antibiotics, were stereoselectively synthesized starting from commercially available methyl (2S)-3-hydroxy-2-methylpropionate (7) in good overall yield (33% for 18 steps).
具有光学活性的4-乙基-3,5-二羟基-2-甲基戊基衍
生物碘化物(4)、苯砜(5)和苯亚砜(6)是聚
醚类抗生素重要结构单元的手性合成单元,可从市售的(2S)-
3-羟基-2-甲基丙酸甲酯(7)出发,以立体选择性方式合成,总收率较高(18步合成,收率为33%)。