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205759-94-0

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205759-94-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 205759-94-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,5,7,5 and 9 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 205759-94:
(8*2)+(7*0)+(6*5)+(5*7)+(4*5)+(3*9)+(2*9)+(1*4)=150
150 % 10 = 0
So 205759-94-0 is a valid CAS Registry Number.

205759-94-0Relevant articles and documents

A process for synthesizing phenylbutyric acid nitrogen mustard antineoplastic agent

-

, (2018/02/04)

The invention relates to a synthesis process of an antineoplastic drug chlorambucil. The synthesis process comprises the following steps: (1) amino protection reaction; (2) acylation reaction; (3) reduction reaction; (4) carboxyl protection reaction; (5) substitution reaction; (6) chlorination reaction; and (7) deprotection reaction. According to the synthesis process, the amino group is protected by use of acetic anhydride, and then acylation, reduction, carboxyl protection, substitution, chlorination and aqueous hydrochloric acid solution hydrolysis are performed to obtain the chlorambucil. The synthesis process of the antineoplastic drug chlorambucil has the characteristics of low cost, mild reaction conditions, low toxicity, convenience in process operation, and suitability for industrial production.

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