A Mutant D-Fructose-6-Phosphate Aldolase (Ala129Ser) with Improved Affinity towards Dihydroxyacetone for the Synthesis of Polyhydroxylated Compounds
作者:José A. Castillo、Christine Guérard-Hélaine、Mariana Gutiérrez、Xavier Garrabou、Martine Sancelme、Melanie Schürmann、Tomoyuki Inoue、Virgil Hélaine、Franck Charmantray、Thierry Gefflaut、Laurence Hecquet、Jesús Joglar、Pere Clapés、Georg A. Sprenger、Marielle Lemaire
DOI:10.1002/adsc.200900772
日期:——
is particularly useful in carboligation multi‐step cascadesynthesis of polyhydroxylated complex compounds. Production of the mutant protein was also improved for its convenient use in synthesis. Several carbohydrates and nitrocyclitols were efficiently prepared, demonstrating the versatile potential of FSA A129S as biocatalyst in organicsynthesis.
New and efficient synthetic routes to 1-deoxy-D-xylulose
作者:José-Luis Giner
DOI:10.1016/s0040-4039(98)00310-4
日期:1998.4
1-deoxy-D-xylulose was synthesized by improved methods. D-Tartaric acid is the starting material for a synthesis which proceeds via the intermediacy of 2,3,4-tribenzyl-D-threitol. Another, highly efficientroute used the Sharpless asymmetric dihydroxylation of 5-benzyloxy-3-penten-2-one as its key step. These syntheses are especially useful for isotopic labeling.
Deoxygenative Olefination Reaction as the Key Step in the Syntheses of Deoxy and Iminosugars
作者:Yung Chang Hsu、Jih Ru Hwu
DOI:10.1002/chem.201201060
日期:2012.6.18
Just a spoonful of sugar! A new synthetic strategy involving the use of a deoxygenative olefination reaction as the key step was developed for the preparation of deoxy and iminosugars in their optically active form (see scheme). This strategy has been proven successful by the use of a pentose, hexose, heptose, and disaccharide as the starting materials. Furthermore, it was applied in a formal total
<scp>D</scp>-Fructose-6-phosphate Aldolase in Organic Synthesis: Cascade Chemical-Enzymatic Preparation of Sugar-Related Polyhydroxylated Compounds
作者:Alda Lisa Concia、Carles Lozano、José A. Castillo、Teodor Parella、Jesús Joglar、Pere Clapés
DOI:10.1002/chem.200802532
日期:2009.4.6
D‐Fructose‐6‐phosphate aldolase (FSA) is a key biocatalyst for the alternative synthetic construction of biologically active products with known therapeutic and research interest or novel structures relevant to drug discovery. Novel aldol addition reactions of dihydroxyacetone and hydroxyacetone to a variety of aldehydes catalyzed by FSA are presented (see scheme).
Donor Promiscuity of a Thermostable Transketolase by Directed Evolution: Efficient Complementation of 1-Deoxy-<scp>d</scp>
-xylulose-5-phosphate Synthase Activity
Enzymes catalyzing asymmetric carboligation reactions typically show very high substrate specificity for their nucleophilic donor substrate components. Structure‐guided engineering of the thermostable transketolase from Geobacillus stearothermophilus by directed in vitro evolution yielded new enzyme variants that are able to utilize pyruvate and higher aliphatic homologues as nucleophilic components