34168-77-9Relevant articles and documents
Sharma,Korytnyk
, p. 573 (1977)
Anomeric Selectivity of Trehalose Transferase with Rare l -Sugars
Bento, Isabel,Hagedoorn, Peter-Leon,Hanefeld, Ulf,Jeffries, Cy M.,Laustsen, Jesper U.,Marsden, Stefan R.,Mestrom, Luuk,Svergun, Dmitri I.,Van Der Eijk, Hessel
, p. 8835 - 8839 (2020/09/18)
Retaining LeLoir glycosyltransferases catalyze the formation of glycosidic bonds between nucleotide sugar donors and carbohydrate acceptors. The anomeric selectivity of trehalose transferase from Thermoproteus uzoniensis was investigated for both d- and l-glycopyranose acceptors. The enzyme couples a wide range of carbohydrates, yielding trehalose analogues with conversion and enantioselectivity of >98%. The anomeric selectivity inverts from α,α-(1 → 1)-glycosidic bonds for d-glycopyranose acceptors to α,β-(1 → 1)-glycosidic bonds for l-glycopyranose acceptors, while (S)-selectivity was retained for both types of sugar acceptors. Comparison of protein crystal structures of trehalose transferase in complex with α,α-trehalose and an unnatural α,β-trehalose analogue highlighted the mechanistic rationale for the observed inversion of anomeric selectivity.
Synthesis method and application of sialylated TF antigen and its fluorination derivatives
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Paragraph 0075; 0078; 0081, (2018/07/07)
The invention discloses a synthesis method and an application of a sialylated TF antigen and its fluorination derivatives. The method includes the following steps: (1) chemically synthesizing fluorogalactose and fluorogalactosamine analogues; (2) chemically synthesizing a fluorinated TF antigen; and (3) synthesizing the sialylated TF antigen and its fluorination derivatives through an enzyme technology. The flexibility of a chemical synthesis technology is combined with the high regioselectivity and the high efficiency of the enzyme synthesis technology, so the enzymatic synthesis of the fluorosialylated TF antigen is achieved for the first time, and the disadvantages of many synthesis steps, poor stereoselectivity, low yield and use of a heavy metal salt in existing chemical synthesis ofthe fluorosialylated TF antigen are overcome. A fluorotumor-associated carbohydrate antigen has a higher stability than natural carbohydrate antigen, so the sialylated TF antigen and its fluorinationderivatives have a broad application prospect in the development of novel antitumor vaccines.
Synthesis of (6-2H)- and 6-deoxy-6-fluoro-L-galactose derivatives
Brackhagen, Meinolf,Boye, Hanna,Vogel, Christian
, p. 31 - 43 (2007/10/03)
The selective oxidation of trimethylsilylated D-galactose diethyl dithioacetal using Collins reagent provided the corresponding D-galacto-hexodialdo dithioacetal. Successive acid hydrolysis, isopropylidenation, and cleavage of the dithioacetal group gave the 1,2;3,4-di-O-isopropylidene-L-galacto-hexodialdo-1,5-pyranose as a key intermediate for the synthesis of 6-fluoro- and 6-deutero-substituted L-fucose derivatives.