[EN] PROCESS FOR PREPARATION OF N-BOC BIPHENYL ALANINOL<br/>[FR] PROCÉDÉ DE PRÉPARATION DE N-BOC ALANINOL BIPHÉNYLIQUE
申请人:CHIRAL QUEST (SUZHOU) CO LTD
公开号:WO2017059759A1
公开(公告)日:2017-04-13
A process is provided for preparation of (R)-N-Boc biphenyl alaninol.It provides a preparation process for a compound outlined as compound 4, which includes these operations: in one of the alcohol solvents, asymmetric hydrogenation of 5 in the presence of [Rh(Duanphos)(X)]Y and hydrogen to provide compound 4. Here "Duanphos" is (Rc,Sp)-Duanphos or (Sc,Rp)-Duanphos; X is NBD or/and COD; Y is one or more of BF4, PF6, SbF6. This process has a lot of advantages, such as low cost, safe operation, less pollution and high yield. The product was obtained in >99% purity and ee which is suitable to scale up in industrial scale.
提供了一种制备(R)-N-Boc联苯丙氨醇的过程。该过程提供了一种用于制备化合物4的制备过程,包括以下操作:在其中一种醇溶剂中,在[Rh(Duanphos)(X)]Y的存在下进行5的不对称氢化反应和氢化反应,以提供化合物4。这里,“Duanphos”是(Rc,Sp)-Duanphos或(Sc,Rp)-Duanphos;X是NBD或/和COD;Y是BF4,PF6,SbF6中的一种或多种。该过程具有许多优点,例如低成本,安全操作,污染少和高产率。产物的纯度和ee均达到了>99%,适合在工业规模上扩大生产。