Aspects of the present application relate to process for the preparation of Pyrrolidine derivatives useful as key intermediates for active ingredients. Specific aspects relate to alternate process for the preparation of Upadacitinib intermediate, 4-ethylpyrrolidine-3-carboxylic acid, its ester or a salt thereof. Processes disclosed here in are cost effective and industrially viable as compared to known processes.
本申请涉及一种用于制备
吡咯烷衍
生物的过程,该衍
生物可用作活性成分的关键中间体。具体方面涉及一种用于制备Upadacitinib中间体4-乙基
吡咯烷-3-
羧酸、其酯或其盐的替代过程。与已知过程相比,本文披露的过程具有成本效益且在工业上可行。