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55343-28-7

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55343-28-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 55343-28-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,3,4 and 3 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 55343-28:
(7*5)+(6*5)+(5*3)+(4*4)+(3*3)+(2*2)+(1*8)=117
117 % 10 = 7
So 55343-28-7 is a valid CAS Registry Number.

55343-28-7Relevant articles and documents

Intramolecular cyclization of some acyclic nucleoside analogs

Janeba, Zlatko,Holy, Antonin,Votavova, Hana,Masojidkova, Milena

, p. 442 - 457 (1996)

Reaction of stereoisomeric 8-bromo-9-(2,3-O-isopropylidene-2,3,4-trihydroxybutyl)adenines (8) with concentrated aqueous ammonia, sodium hydride, potassium tert-butoxide, or 1,8-diazabicyclo-[5,4,0]undec-7-ene afforded 4′-O,8-anhydro-9-(2,3-O-isopropyliden

SYNTHESIS OF 9-(2-PHOSPHONYLMETHOXYETHYL)ADENINE AND RELATED COMPOUNDS

Holy, Antonin,Rosenberg, Ivan

, p. 2801 - 2809 (2007/10/02)

Diethyl 2-hydroxyethoxymethanephosphonate (VIII) was converted into diethyl 2-halogenoethoxymethanephosphonates IXa and IXb by reaction with triphenylphosphine and tetrachloromethane or tetrabromomethane; analogous reaction of VIII with p-toluenesulfonyl chloride afforded diethyl 2-(p-toluenesulfonyloxy)ethoxymethanephosphonate (IXc).Reaction of sodium salt of adenine with compounds IX led to 9-(2-diethoxyphosphonylmethoxyethyl)adenine (X).Compound X was converted into 9-(2-phosphonylmethoxyethyl)adenine (II) by treatment with bromotrimethylsilane whereas alkaline hydrolysis of X gave ethyl ester Vb.Reaction of 9-(2-hydroxyethyl)adenine (IIIa) or its N6-benzoyl derivative IIIb with dimethyl p-toluenesulfonyloxymethanephosphonate (IV) in the presence of sodium hydride, followed by alkaline hydrolysis yielded methyl ester Va.Morpholide XI reacted with an inorganic phosphate and diphosphate to give 9-(2-phosphorylphosphonylmethoxyethyl)adenine (XII) and 2-(diphosphorylphosphonylmethoxyethyl)adenine (XIII), respectively.

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