Monti D, Gazák R, Marhol P, Biedermann D, Purchartová K, Fedrigo M, Riva S, Kren V. Enzymatic kinetic resolution of silybin diastereoisomers.
JOURNAL OF NATURAL PRODUCTS 2010;
73:613-9. [PMID:
20297826 DOI:
10.1021/np900758d]
[Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In nature, the flavonolignan silybin (1) occurs as a mixture of two diastereomers, silybin A and silybin B, which in a number of biological assays exhibit different activities. A library of hydrolases (lipases, esterases, and proteases) was tested for separating the silybin A and B diastereomers by selective transesterification or by stereoselective alcoholysis of 23-O-acetylsilybin (2). Novozym 435 proved to be the most suitable enzyme for the preparative production of both optically pure silybins A and B by enzymatic discrimination. Gram amounts of the optically pure substances can be produced within one week, and the new method is robust and readily scalable to tens of grams.
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