Production of (R)-Aminoglutethimide: A New Route from 1-Chloro-4-nitrobenzene
摘要:
The development of a short, safe and enantioselective route for the preparation of (R)-aminoglutethimide is described, The process was designed for economic large-scale manufacture of the bulk drug substance to acceptable quality standards, to allow clinical evaluation of the single enantiomer over the existing racemate. (R)-Aminoglutethimide was prepared from 1-chloro-4-nitrobenzene using a six-stage synthetic sequence, via chemoresolution of key intermediate racemic 4-cyano-4-(4-nitrophenyl)hexanoic acid using (-)-cinchonidine, The process allowed for preparation of several kilograms of the precursor (R)-nitroglutethimide, to cGMP at pilot-plant scale, along with demonstration of the find hydrogenation step to (R)-amino-glutethimide in the laboratory, This route avoids the problems of hazardous nitration technology, and therefore regio-isomer contamination of the product, associated with other procedures. The resolution chemistry described represents an improvement on literature procedures, Optimisation of the asymmetric Michael addition offers an attractive alternative approach.
Thiazole formation through a modified Gewald reaction
作者:Carl J Mallia、Lukas Englert、Gary C Walter、Ian R Baxendale
DOI:10.3762/bjoc.11.98
日期:——
The synthesis of thiazoles and thiophenes starting from nitriles, via a modified Gewald reaction has been studied for a number of different substrates. 1,4-Dithiane-2,5-diol was used as the aldehyde precursor to give either 2-substitutedthiazoles or 2-substituted aminothiophenes depending on the substitution of the alpha-carbon to the cyano group.
Processes for the preparation of Niraparib and intermediates thereof
申请人:TEVA PHARMACEUTICALS INTERNATIONAL GMBH
公开号:US10927095B2
公开(公告)日:2021-02-23
The present invention relates to novel procedures and novel intermediates useful in the synthesis of Niraparib or any salt thereof.
本发明涉及用于合成尼拉帕利或其任何盐类的新型程序和新型中间体。
PROCESSES FOR THE PREPARATION OF NIRAPARIB AND INTERMEDIATES THEREOF
申请人:Teva Pharmaceuticals International GmbH
公开号:EP3668857A1
公开(公告)日:2020-06-24
[EN] NOVEL PLK1 DEGRADATION INDUCING COMPOUND<br/>[FR] NOUVEAU COMPOSÉ INDUISANT LA DÉGRADATION DE PLK1
申请人:[en]UPPTHERA, INC.
公开号:WO2023017446A1
公开(公告)日:2023-02-16
The present disclosure relates to a novel PLK1 degradation inducing compound, a method for preparing the same, and the use thereof. The compounds of the present disclosure exhibit an effect of inducing PLK1 degradation. Therefore, the compounds of the present disclosure may be effectively utilized for preventing or treating PLK1-related diseases.