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74570-02-8

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74570-02-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74570-02-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,5,7 and 0 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 74570-02:
(7*7)+(6*4)+(5*5)+(4*7)+(3*0)+(2*0)+(1*2)=128
128 % 10 = 8
So 74570-02-8 is a valid CAS Registry Number.

74570-02-8Relevant articles and documents

Method for preparing levallorphan tartrate

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, (2017/08/29)

The invention provides a method for preparing levallorphan tartrate and belongs to the technical field of drug and chemical synthesis. The method takes methoxyphenylacetic acid and 2-(cyclohexenyl)ethylamine as initial raw materials, and comprises nine reaction steps such as acylation condensation, Bischler-Napieralski ring formation reaction, imine reduction, ether bond hydrolysis, resolution, N-alkylation, Grewe cyclization reaction, and salifying. According to the method, the levallorphan tartrate and each intermediate can be obtained at high yield and high purity, and the method can serve as an industrial method for performing large-scale production.

PROCESS FOR MAKING OPTICALLY ACTIVE NAPHTHO[1,2-B][1,4]THIAZEPIN-4(5H)-ONES

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, (2008/06/13)

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