5-Phenyl-2S-pentanol is synthesised stereospecifically from a chiral ketone of the formula:
by hydrogenation over a noble metal catalyst: the chiral ketone is preparable from S-ethyl lactate. Also included are certain novel intermediates, including those of the formula (II), useful in these processes. The method provides easily purified 5-phenyl-2S-pentanol useful in the synthesis of central nervous system active (CNS) agents such as levonantradol.
5-苯基-2S-
戊醇是由式中的手性酮通过
贵金属催化剂氢化立体定向合成的:
通过在
贵金属催化剂上氢化:手性酮可由 S-
乳酸乙酯制备。此外,还包括某些在这些工艺中有用的新型中间体,包括式 (II) 的中间体。该方法提供了易于纯化的 5-苯基-2S-
戊醇,可用于合成中枢神经系统活性(CNS)制剂,如左旋南雷多。