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84441-54-3

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84441-54-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 84441-54-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,4,4 and 1 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 84441-54:
(7*8)+(6*4)+(5*4)+(4*4)+(3*1)+(2*5)+(1*4)=133
133 % 10 = 3
So 84441-54-3 is a valid CAS Registry Number.

84441-54-3Relevant articles and documents

Preparation method of (R)-1-(6-amino-9H-purine-9-yl)2-phenyl ester

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Paragraph 0020-0022, (2017/07/21)

The invention discloses a preparation method of preparation method of (R)-1-(6-amino-9H-purine-9-yl)2-phenyl ester, and belongs to the field of chemical synthesis. According to the preparation method, in a solvent, (chloromethyl) phosphonic acid phenyl ester is taken as an initial raw material, substitution reaction with sodium iodide is carried out, basic hydrolysis is carried out, and an obtained product is reacted with (S)-1-(6-amino-9H-purine-9-yl) propan-2-ol so as to obtain the reaction finished product (R)-1-(6-amino-9H-purine-9-yl)2-phenyl ester. The conditions are convenient to control; post-treatment is simple; few side reaction is caused; yield is high; and requirements of industrialized production are satisfied.

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