[EN] SITAGLIPTIN SYNTHESIS<br/>[FR] SYNTHÈSE DE LA SITAGLIPTINE
申请人:GENERICS UK LTD
公开号:WO2010131025A1
公开(公告)日:2010-11-18
The present invention relates to novel processes for the preparation of enantiomerically enriched β -amino acid derivatives such as β -amino esters useful for the synthesis of enantiomerically enriched biologically active molecules such as sitagliptin. The key step involves the resolution of the racemate with mandelic acid.
The present invention relates to novel processes for the preparation of enantiomerically enriched β-amino acid derivatives such as β-amino esters useful for the synthesis of enantiomerically enriched biologically active molecules such as sitagliptin. The key step involves the resolution of the racemate with mandelic acid.
Disclosed herein are substituted benzhydrylethers of Formula I, processes of preparation thereof, pharmaceutical compositions thereof, and methods of their use thereof.
本文揭示了式I的取代苯基乙醚,其制备方法,药物组合物以及它们的使用方法。
METHOD OF PREPARING (3R,4S)-3-ACETAMIDO-4-ALLYL-N-(TERT-BUTYL)PYRROLIDINE-3-CARBOXAMIDE
申请人:CALITHERA BIOSCIENCES, INC.
公开号:US20180362459A1
公开(公告)日:2018-12-20
A method is provided to conveniently separate racemic (3R,4S)-3-acetamido-4-allyl-N-(tert-butyl)pyrrolidine-3-carboxamide and (3S,4R)-3-acetamido-4-allyl-N-(tert-butyl)pyrrolidine-3-carboxamide using selective crystallization with chiral carboxylic acids.
[EN] PROCESS FOR ENANTIOMERIC ENRICHMENT OF 2 ', 6 ' - PIPECOLOXYLIDIDE<br/>[FR] PROCÉDÉ D'ENRICHISSEMENT ÉNANTIOMERIQUE DE 2', 6'-PIPÉCOLOXYLIDIDE
申请人:NEON LAB LTD
公开号:WO2014009964A1
公开(公告)日:2014-01-16
The invention discloses a process for enantiomeric enrichment of 2',6'-pipecoloxylidide using a chiral carbamoyl benzoic acid to provide (S)-enantiomer in high yield and high enantiomeric purity. The invention also discloses novel intermediates formed in the process of enantiomeric enrichment of 2',6'-pipecoloxylidide, preparation of N- substituted amidic acids and alkylation of 2',6'-pipecoloxylidide.