衰老
发表于 2025-3-25 07:04:55
Lehrbuch der technischen Mechaniksynthesis. These derivatives might be divided into four main classes depending on the size of the heterocyclic ring i.e., oxiranes (e.g., 1), oxetanes (e.g., 2), THF derivatives (e.g., 3), and THP derivatives (e.g., 4; Fig. 1.). The latter are very rare and only limited examples can be found in lite
巩固
发表于 2025-3-25 08:43:31
,Maasse und Gesetzmässigkeiten, represented by the naturally occurring carbohydrate building blocks of plant materials and antibiotics. Although there is a plethora of synthetic methods for the formation of a C-C bond in saccharides, those which are the most frequently employed are the aldol-type condensation processes, and utili
Gorilla
发表于 2025-3-25 14:10:02
https://doi.org/10.1007/978-3-662-41112-4arbon sugar antibiotic anamarine 2 (Fig. 1) [.] may be mentioned as examples. Many unnatural, synthetically modified, unsaturated sugar derivatives posses significant biological activity. The 2,3-unsaturated nucleosides are among the most striking examples of such compounds; the most representative
erythema
发表于 2025-3-25 18:16:08
https://doi.org/10.1007/978-3-7091-9972-5ive years. Degradation reactions at non-anomeric centers initiated by fragmentation reactions at the anomeric center are included. The general background of degradation reactions is well described in the standard textbooks [., .].
取之不竭
发表于 2025-3-25 22:00:02
Kritisches Gutachten und Berichterstattung, book [.] contains an informative survey of developments in this area. The rearrangement reactions described here are classified into five groups: double bond shifts, cyclo-rearrangements associating with double bond, rearrangements associating with epoxy system, ring isomerizations (contraction and
delusion
发表于 2025-3-26 00:56:49
Die Sinnesempfindungen in der Mundhöhlevailability of carbohydrates, often in both enantiomeric forms, makes this class of compounds attractive, especially as chiral substrates for the synthesis of optically active, non-carbohydrate products. Carbohydrates can thus be transformed into versatile chiral starting materials having a suitable
gentle
发表于 2025-3-26 04:46:18
https://doi.org/10.1007/978-3-642-91309-9 not involved in the oxidation/reduction is needed. For more detailed information on the different reagents for oxidations and reductions an eight-volume comprehensive encyclopedia is recommended [.].
珊瑚
发表于 2025-3-26 10:51:33
http://reply.papertrans.cn/39/3872/387113/387113_28.png
鬼魂
发表于 2025-3-26 14:12:33
http://reply.papertrans.cn/39/3872/387113/387113_29.png
联合
发表于 2025-3-26 19:58:47
Glycoscience: Chemistry and Chemical Biology I–III