Staniland S, Yuan B, Giménez-Agulló N, Marcelli T, Willies SC, Grainger DM, Turner NJ, Clayden J. Enzymatic desymmetrising redox reactions for the asymmetric synthesis of biaryl atropisomers.
Chemistry 2014;
20:13084-8. [PMID:
25156181 PMCID:
PMC4497317 DOI:
10.1002/chem.201404509]
[Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Indexed: 12/02/2022]
Abstract
Atropisomeric biaryls carrying ortho-hydroxymethyl and formyl groups were made enantioselectively by desymmetrisation of dialdehyde or diol substrates. The oxidation of the symmetrical diol substrates was achieved using a variant of galactose oxidase (GOase), and the reduction of the dialdehydes using a panel of ketoreductases. Either M or P enantiomers of the products could be formed, with absolute configurations assigned by time-dependent DFT calculations of circular dichroism spectra. The differing selectivities observed with different biaryl structures offer an insight into the detailed structure of the active site of the GOase enzyme.
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