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23428-79-7

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23428-79-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 23428-79-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,4,2 and 8 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 23428-79:
(7*2)+(6*3)+(5*4)+(4*2)+(3*8)+(2*7)+(1*9)=107
107 % 10 = 7
So 23428-79-7 is a valid CAS Registry Number.

23428-79-7Relevant articles and documents

Full-synthetic method of racemic tetrandrine

-

, (2019/07/10)

The invention discloses a full-synthetic method of racemic tetrandrine, and belongs to the technical field of drug synthesis. The full-synthetic method of the racemic tetrandrine comprises the steps that a synthetic route adopts a convergence synthesis method, a 5-bromovanillin, namely a compound 1 and 3-hydroxy-4-methoxyphenylacetic acid, namely a compound 5 are taken as starting materials to obtain a compound 4 and a compound 6 respectively, then the compound 4 and the compound 6 are taken as raw materials to synthesize a compound 11, a compound 19 is synthesized from the compound 11, and finally, the compound 11 reacts with the compound 19. The full-synthetic method of the racemic tetrandrine has the advantages that the synthetic efficiency is higher, the yield is higher, and the cost is lower; the reaction conditions are milder, the operation is simple and convenient, the industrial value is higher, and a reference is provided for the full-synthetic method of optical voidness tetrandrine.

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