The present invention provides a process for the preparation of (4R)-1-(tert- butoxycarbonyl)-4-hydroxy-L-proline of Formula IV. The present invention also provides a process for the preparation of (2S,4S)-4-[4-(3-methyl-1-phenyl-1H-pyrazol-5-yl) piperazin-1-yl] pyrrolidin-2-yl}(1,3-thiazolidin-3-yl) methanone of Formula II, or salts thereof, using (4R)-1-(tert-butoxycarbonyl)-4-hydroxy-L-proline of Formula IV.
本发明提供了一种制备式为IV的(4R)-1-(tert-丁氧羰基)-
4-羟基-
L-脯氨酸的方法。本发明还提供了一种使用式为IV的(4R)-1-(tert-丁氧羰基)-
4-羟基-
L-脯氨酸制备式为II的(2S,4S)-4-[4-(3-甲基-1-苯基-1H-
吡唑-5-基)
哌嗪-1-基]
吡咯烷-2-基}(1,3-
噻唑烷-3-基)甲酮或其盐的方法。