Suchý M, Charlton TA, Ben RN, Shuhendler AJ. Synthesis of natural/
13C-enriched d-tagatose from natural/
13C-enriched d-fructose.
Carbohydr Res 2021;
507:108377. [PMID:
34303197 DOI:
10.1016/j.carres.2021.108377]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/08/2021] [Accepted: 06/14/2021] [Indexed: 10/21/2022]
Abstract
A concise, easily scalable synthesis of a rare ketohexose, d-tagatose, was developed, that is compatible with the preparation of d-[UL-13C6]tagatose. Epimerization of the widely available and inexpensive ketohexose d-fructose at the C-4 position via an oxidation/reduction (Dess-Martin periodinane/NaBH4) was a key step in the synthesis. Overall, fully protected natural d-tagatose (3.21 g) was prepared from d-fructose (9 g) on a 50 mmol scale in 23% overall yield, after five steps and two chromatographic purifications. d-[UL-13C6]Tagatose (92 mg) was prepared from d-[UL-13C6]fructose (465 mg, 2.5 mmol) in 16% overall yield after six steps and four chromatographic purifications.
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