Synthesis of enantiopure l-(5-phenylfuran-2-yl)alanines by a sequential multienzyme process

Autor:	László Csaba Bencze, Florin Dan Irimie, László Poppe, Laura Ancuţa Pop, József Nagy, Balázs Komjáti, Csaba Paizs, Monica Ioana Toşa
Rok vydání:	2015
Předmět:	chemistry.chemical_classification Chemistry Stereochemistry Organic Chemistry Enantioselective synthesis Catalysis Kinetic resolution Amino acid Inorganic Chemistry Hydrolysis Enantiopure drug Stereoselectivity Physical and Theoretical Chemistry Enantiomer Enantiomeric excess
Zdroj:	Tetrahedron: Asymmetry. 26:1095-1101
ISSN:	0957-4166
Popis:	The enantioselective synthesis of unnatural amino acids is an attractive goal. Increasing attention has been given in recent years to the development of dynamic kinetic resolution processes, providing the desired enantiomer in almost quantitative yields and with high enantiopurity. Herein we describe an efficient sequential multi-enzyme process for the preparation of enantiopure 5-phenylfuran-2-ylalanines l -4a–d, starting from racemic 2-acetamido-3-(5-phenylfuran-2-yl)propanoic acids rac-1a–d. The first step, the CaL-B-mediated dynamic kinetic resolution of the racemic oxazolones provided the N- and C-protected l -amino acids l -2a–d (81–92% ee) with 100% theoretical yield. The protecting groups were removed in excellent yields by a second (mild non-stereoselective PLE mediated hydrolysis of the ester) and a third (Acylase I catalyzed stereoselective hydrolysis of the amide) enzymatic step, thus increasing the enantiomeric excess of the target compounds over 99%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::277131e8471ffde0d754639dfea74f47 https://doi.org/10.1016/j.tetasy.2015.08.004 Zobrazit plný text záznamu Full Text from ScienceDirect