To prepare labeled precursors for biosynthetic studies, methods for the specific introduction of tritium and deuterium into the reducing and the terminal glucose unit of maltotriose were developed. Thus [6"-3H]- and (6"-2H)-maltotriose (17) and (18) were prepared via selective methoxytritylation, de
The enantiospecific synthesis of [5-2H]-epi-shikimic acid and of (6R) [6-2H]-, (6S) [6-2H]- and [6-2H2] shikimic acid
✍ Scribed by Lolita O. Zamir; Cong-Danh Nguyen; Shu Wen Li; Anastasia Nikolakakis; Françoise Sauriol
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- French
- Weight
- 607 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
The enantioselective synthesis of [5‐^2^H]‐5‐epi‐shikimic acid starting from commercially available L‐shikimic acid has been accomplished in this work. The introduction of the stable isotope was facilitated by an enzymic reduction of a ketone. An interesting stereospecific enolisation was also observed during this reaction resulting in partial deuteration of the 6‐equatorial position. In addition, the enantioselective syntheses of methyl (6R) [6‐^2^H]‐, and (6__S__) [6‐^2^H] shikimate are described. The procedure is an adaptation of a reported^(1)^ enantiospecific synthesis of shikimic acid, with the inclusion of an enzymic reduction step.
📜 SIMILAR VOLUMES
## 2 , : 'H-NMR (CDCI,): 5.93 (dd, J = 10.7. 1.5); 5.67 6a. 7.7,8,octun-S-oiir @a): 'H-NMR (CDCI,): 3.98, 3.78 ( A R , . 0 ] o l l a l r (9a): ' H-N MR (CDCI,) : 4.02, 3.65 (.4 R, -c/io.~-aspiro~3.5/nori-X-i~.nr~ (7b): 'H-NMR (CDCI,): 6.04 (d, J = 10.4); 5.63 (d, ( d , J = 10.7);4.I0(dd,J=11.7,1.