[EN] SELECTIVE VALORIZATION OF BIOMASS SUGARS<br/>[FR] VALORISATION SÉLECTIVE DE SUCRES DE BIOMASSE
申请人:MASSACHUSETTS INST TECHNOLOGY
公开号:WO2021127642A1
公开(公告)日:2021-06-24
Disclosed are methods of forming an epimer or a dehydrated isomer of a pyranose monosaccharide or a pyranose saccharide residue in an oligosaccharide or a glycoside.
公开了在寡糖或糖苷中形成吡喃糖单糖或吡喃糖残基的对映体或脱水异构体的方法。
2-Keto-3-deoxy-6-phosphogluconate Aldolases as Catalysts for Stereocontrolled Carbon−Carbon Bond Formation
作者:Michael C. Shelton、Ian C. Cotterill、Sarah T. A. Novak、Rahib M. Poonawala、Sunil Sudarshan、Eric J. Toone
DOI:10.1021/ja952596+
日期:1996.1.1
pyruvate aldolases use pyruvate as the nucleophilic component in stereoselective aldol condensations, producing a 4-hydroxy-2-ketobutyrate framework. We have examined the 2-keto-3-deoxy-6-phosphogluconate (KDPG) aldolases from Pseudomonas putida, Escherichia coli, and Zymomonas mobilis for utility as synthetic reagents. Unlike other pyruvate aldolases examined to date, the KDPG aldolases accept short-chain
A novel lactone derivative that is expressed by the following structural formula (I).
一种新的内酯衍生物,其化学结构式(I)如下所示。
Production Of 2'-Deoxynucleosides And 2'-Deoxynucleoside Precursors From 2-Dehydro-3-Deoxy-D-Gluconate
申请人:Doring Volker
公开号:US20070212759A1
公开(公告)日:2007-09-13
This invention relates to a process for preparing 2′-deoxynucleoside compounds or 2′-deoxynucleoside precursors using 2-dehydro-3-deoxy-D-gluconic acid (usually abbreviated as KDG) or its salts as a starting material. A variety of 2′-deoxynucleosides and their analogues are used as a starting material for synthesis or drug formulation in production of an antiviral, anticancer or antisense agent.
Macrolide antibiotics, process for their preparation, inter alia by fermentation, and pharmaceutical compositions containing them
申请人:SCHERING CORPORATION
公开号:EP0033433A1
公开(公告)日:1981-08-12
Disclosed are novel macrolide antibiotics of the general formula
wherein R is H or OH; M is 0 or (H,OH); Z is the group of formula II,
-CH7OH or groups which may be derived therefrom; A represents a double bond between carbon atoms of positions 12 and 13 or, together with the carbon atoms of positions 12 and 13, an oxirane ring. B represents a double bond between the carbon atoms of positions 10 and 11 or together with the carbon atoms of positions 10 and 11 the group -CH2-CH(O')-or-CH2-CH(O2)- and the non-toxic pharmaceutically acceptable ester and acid addition salts thereof.
The novel antibiotic complex designated antibiotic AR-5 of the formula
(falling within the scope of formula I), wherein R is hydrogen or hydroxy, and A represents a double bond or together with the carbon atoms of positions 12 and 13 an oxirane ring, can be produced by fermentation of a new species of the genus Micromonospora. which is Micromonospora Polytrota (e.g. NRRL 12066) The other compounds of formula I can be derived from the compounds of antibiotic AR-5 complex
The compounds shown antibacterial activity. The gentamycine C complex is also produced by mic- romonospora polytrota NRRL 12066
公开了通式如下的新型大环内酯类抗生素
其中 R 是 H 或 OH;M 是 0 或 (H,OH);Z 是式 II 的基团、
-A 代表位置 12 和 13 的碳原子之间的双键,或与位置 12 和 13 的碳原子一起构成环氧乙烷环。B 代表位置 10 和 11 的碳原子之间的双键,或与位置 10 和 11 的碳原子一起代表基团-CH2-CH(O')-或-CH2-CH(O2)-及其无毒的药学上可接受的酯和酸加成盐。
新型抗生素复合物命名为抗生素 AR-5,其式为
(属于式 I 的范围),其中 R 是氢或羟基,A 代表双键或与第 12 位和第 13 位的碳原子一起代表环氧乙烷环,可通过小孢子菌属的一个新物种发酵制得,该新物种是 Polytrota 小孢子菌(例如 NRRL 12066)。
显示出抗菌活性的化合物。NRRL 12066 也能产生庆大霉素 C 复合物。