申请人:——
公开号:US20040254392A1
公开(公告)日:2004-12-16
A method for producing an optically active 3,5-dihydroxyhexanoic acid derivative by stereoselectively reducing an optically active 3-oxo-5-hydroxyhexanoic acid derivative is provided. The method, which requires neither an ultralow-temperature reactor, an incubator, nor protection of the 5-position hydroxy group, is simple and economical.
An optically active 3,5-dihydroxyhexanoic acid derivative is produced by asymmetrical hydrogenation of an optically active 3-oxo-5-hydroxyhexanoic acid derivative catalyzed by an RuBr
2
BINAP complex prepared from a ruthenium complex and a ruthenium-optically active phosphine complex, i.e., 2,2′-bisdiarylphosphino-1,1′-binaphthyl (BINAP), while using extremely inexpensive hydrogen as the reductant.
提供了一种通过立体选择性还原光学活性3-氧代-5-羟基己酸衍生物来制备光学活性3,5-二羟基己酸衍生物的方法。该方法既不需要超低温反应器、孵化器,也不需要保护5-位羟基,简单经济。通过使用一种由钌配合物和钌光学活性膦配合物即2,2'-双芳基膦基-1,1'-联萘(BINAP)制备的RuBr2BINAP复合物作为催化剂,使用极为廉价的氢作为还原剂,对光学活性3-氧代-5-羟基己酸衍生物进行不对称加氢,从而制备出光学活性的3,5-二羟基己酸衍生物。