Efficient methods have been developed for the synthesis of three active pharmaceutical ingredients (APIs) carbamazepine (Tegretol (R)) 1, oxcarbazepine (Trileptal (R)) 2, and eslicarbazepine acetate (Exalief (R)) 3 by employing enantioselective reduction and carboxamidation reaction. (C) 2013 Elsevier Ltd. All rights reserved.
Corey–Itsuno Reduction of Ketones: A Development of Safe and Inexpensive Process for Synthesis of Some API Intermediates
作者:Rajendra D. Mahale、Sudhir P. Chaskar、Kiran E. Patil、Golak C. Maikap、Mukund K. Gurjar
DOI:10.1021/op300034u
日期:2012.4.20
A safe and inexpensive procedure for asymmetric reduction of ketones using in situ prepared N,N-diethylaniline borane (DEANB) and oxazaborolidine catalyst from sodium borohydride, N,N-diethylaniline hydrochloride and (S)-alpha,alpha-diphenylprolinol is described. This protocol is demonstrated successfully to manufacture enantiopure dapoxetine at the plant scale.
Iridium/f-Amphol-catalyzed Efficient Asymmetric Hydrogenation of Benzo-fused Cyclic Ketones
作者:Congcong Yin、Xiu-Qin Dong、Xumu Zhang
DOI:10.1002/adsc.201800839
日期:2018.11.16
Iridium/f‐Amphol‐catalyzedasymmetrichydrogenation of various benzo‐fused five to seven‐membered cyclic ketones was successfully developed, affording a series of chiral benzo‐fused cyclic alcohols with excellent results (75%–99% yields, 93%–>99% ee, and TON up to 297 000). The enantioenriched products can be employed as key intermediates or motifs for the synthesis of some important biologically active