Nitrogen glycosides

Figure 1.17 Examples of (a) oxygen glycosides, (b) nitrogen glycosides and (c) carbon glycosides. The shaded parts of the structures are the aglycone sections...

An ingenious theory has been advanced by Weygand based on the observation that when aryl (p-tolyl-, p-phenetyl-) isoglycosamines (XL), produced from the corresponding nitrogen glycosides by the Amadori rearrangement, are heated with phenylhydrazine hydrochloride and... 

In structure, these nucleotides correspond to the purine nucleotides in being phosphoric esters of nitrogenous glycosides. 

The most important derivatives of pyrimidines and purines are nucleosides Nucleosides are N glycosides m which a pyrimidine or purine nitrogen is bonded to the anomeric carbon of a carbohydrate The nucleosides listed m Table 28 2 are the mam building blocks of nucleic acids In RNA the carbohydrate component is d ribofuranose m DNA It IS 2 deoxy d ribofuranose... 

Figure 1.42 The three pyrimidine bases common to nucleic acid construction. Cytosine and thymine are found in DNA, while in RNA, uracil residues replace thymine. The associated sugar groups are bound in N-glycosidic linkages to the N-l nitrogen.

NprbaskR, Aaboer DB, Bleeg IS, Christensen BT, Kondo T, Brandt K (2003) Flavone C-glycoside, phenolic acid, and nitrogen contents in leaves of barley subject to organic fertilization treatments. J Agric Food Chem 51 809-13... 

Alkylation, acylation, and glycosidation of ring nitrogen atoms of ring systems discussed in this chapter have been reported. The transformations are depicted in Scheme 4. 

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