9- 5 deoxy-5 adenine

B. In DNA the sugar residue is deoxy-adenine, whereas in RNA it is adenine. 

The number of bound phosphates can vary in a nucleotide. When phosphate is absent, the molecule is referred to as a nucleoside or a deoxynucleoside, depending on the hydroxylation-state of the sugar. Up to three phosphate groups can be present. When one or more phosphates are present, the compound is commonly referred to by the base present, how many phosphates are present, and whether the deoxy-form of the sugar is used. For example, when the base adenine is present and there are two phosphates, the corresponding deoxyribonucleotide and ribonucleotide are typically referred to by the abbreviations, dADP and ADR The former and latter abbreviations indicate deoxy-adenine diphosphate and... 

Adenine, 9- -D-2-deoxyribofuranosyl-, 5, 536 Adenine, 8-(2-deoxy-/3-D-ribosyl)-synthesis, 5, 585 Adenine, 2,8-dialkyl-synthesis, 5, 569 Adenine, 2,8-dichloro-reactions... 

The bromide (2a) reacted also with chloromercuri-N-benzoyladenine to give, after debenzoylation, 9- (2-deoxy-/ -D-arabino-hexopyranosyl) -adenine (15). A later paper reported (18) on the coupling of 2a with... 

The sugar component in RNA is ribose, and the sugar in DNA is 2 -deoxy-ribose. (The prefix 2 -deoxv indicates that oxygen is missing from the 2 position of ribose.) DNA contains four different amine bases, two substituted purines (adenine and guanine) and two substituted pyrimidines (cytosine and thymine). Adenine, guanine, and cytosine also occur in RNA, but thymine is replaced in RNA by a closely related pyrimidine base called uracil. 

Deoxy-p-D-eryfhro-pentofuranosyl)adenine not adenine 8-(2-deoxyriboside) o... 

The analogons deamination reaction is not observed in l-methyl-2 -deoxy-adenosine nncleosides. ° Rather, in the adenine series, the Dimroth rearrangement occnrs (Scheme 8.4). On the contrary, in styrene adducts of 2 -deoxyadenosine, the hydroxyl residue of the adduct undergoes intramolecular reaction with the base to initiate deamination (Scheme 8.6). ° ° Similarly, cytosine residues bearing styrene adducts at the N3-position undergo rapid deamination (nearly complete deamination is seen within 75h). °°... 

The reaction of adenosine with 2-acetoxy-2-methylpropanoyl chloride or the corresponding bromide is less regioselective than that of uridine,400 and gives 9-(2-0-acetyl-3-deoxy-3-halo-/3-D-xylofuranosyl)-and9-(3-0 - acetyl - 2 - deoxy - 2 - halo - /3 - D - arabinofuranosyl) - adenine,... 

A nucleoside consists of a purine or pyrimidine base linked to a pentose, either D-ribose to form a ribonucleo-side or 2-deoxy-D-ribose to form a deoxyribonucleoside. Three major purine bases and their corresponding ribo-nucleosides are adenine/adenosine, guanine/guanosine and hypoxanthine/inosine. The three major pyrimidines and their corresponding ribonucleosides are cytosine/ cytodine, uracil/uradine and thymine/thymidine. A nucleotide such as ATP (Fig. 17-1) is a phosphate or polyphosphate ester of a nucleoside. 

Other sulfide photoreactions result when appropriate nucleoside derivatives are photolyzed. Upon irradiation in acetonitrile, 9-[5-deoxy-2,3-0-isopropylidene-5-(phenylthio)-/3-D-ribofuranosyl]-adenine (53) is converted into the anhydronucleoside 8,5 -anhydro-(5 -deoxy-2, 3 -0-isopropylidene-adenosine) (55) in 66% yield.111 Similar reactions were observed when other sulfur-containing nucleosides were irradiated (see Table XIII). The reaction of the sulfide 53... 

The Coffee (syn. Madder) botanical family (Rubiaceae Juss.) (Table 15) consists of more than 400 genera and over 6000 species. It grows in the tropics and the sub-tropics. Plants belonging to this family include trees, bushes and liane. The Coffee plant family contains two major purines of adenine- /guanine-derived alkaloids, the so-called purine alkaloids . Purine is a nitrogenous base of nucleotide, which consists of just purine and pentose sugar (o-ribose or 2 deoxy-D-ribose). Typical purine alkaloids are caffeine, theophylline and theobromine. The same or similar purine alkaloids occur also in other plant families. 

In nucleotide structure, the central component is the 5-carbon furanoside monosaccharide, either D-ribose (in RNA) or 2-deoxy-D-ribose (in DNA). The four heterocyclic bases found in DNA-based nucleotides are adenine, guanine, cytosine, and thymine ... 

Page 46, line 21. For l-(Adenin-9-yl)-l-deoxyl- read l-(Adenin-9-yl)-l-deoxy-. ... 

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