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28220-12-4

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28220-12-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 28220-12-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,2,2 and 0 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 28220-12:
(7*2)+(6*8)+(5*2)+(4*2)+(3*0)+(2*1)+(1*2)=84
84 % 10 = 4
So 28220-12-4 is a valid CAS Registry Number.

28220-12-4Downstream Products

28220-12-4Relevant articles and documents

Ikehara,Uesugi

, p. 3687,3688,3689,3690,3692 (1972)

Synthesis method and application of vidarabine monophosphate

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Paragraph 0074; 0076-0077; 0086, (2021/07/28)

The invention belongs to the field of medicine synthesis, and discloses a synthesis method and application of vidarabine monophosphate. According to the synthesis method, 5-iodo-2-((phosphonooxy) methyl)-4-(tosyloxy)tetrahydrofuran-3-yl acetate and tert-butyl (8-hydroxy-9H-purin-6-yl)carbamate are subjected to condensation, epoxidation, ring opening and desulfurization reaction, and the vidarabine monophosphate is synthesized. According to the synthesis method of vidarabine monophosphate, provided by the invention, the industrial production steps are further simplified, the total reaction yield is improved, and the industrial production cost is reduced. The method is suitable for synthesizing vidarabine monophosphate, and the synthesized vidarabine monophosphate is used for preparing vidarabine monophosphate for injection.

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