MOST EFFECTIVE PROCESS FOR BASE-FREE PREPARATION OF KETONE INTERMEDIATES USABLE FOR MANUFACTURE OF NEBIVOLOL
申请人:CORDON PHARMA INTERNATIONAL GmbH
公开号:US20150232441A1
公开(公告)日:2015-08-20
The invention relates to a process for the preparation of a ketone of a general formula 1
with X being Cl or Br, in particular with X being Cl, with Y being F, Cl, Br, I or H, in particular with Y being F,
comprising the steps of: activation of a carboxylic acid by using a peptide coupling agent, coupling of the activated carboxylic acid with a malonic acid derivative providing a β-ketoester precursor and converting the β-ketoester precursor to the ketone of the general formula 1.
本发明涉及一种制备一般式1的酮的过程,其中X为Cl或Br,特别是X为Cl,Y为F、Cl、Br、I或H,特别是Y为F,包括以下步骤:通过使用肽偶联试剂激活羧酸,将激活的羧酸与丙二酸衍生物偶联,提供β-酮酯前体,并将β-酮酯前体转化为一般式1的酮。